<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
<!--Generated by ThunderDome XBRL - 02:20AM UTC 2020-04-30--><link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple"/>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-34-delisting-of-tenariss-shares-from-the-buenos-aires-stock-exchange" xlink:href="ts-20191231.xsd#statement-note-34-delisting-of-tenariss-shares-from-the-buenos-aires-stock-exchange" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-34-delisting-of-tenariss-shares-from-the-buenos-aires-stock-exchange" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DelistingOfSharesFromStockExchangeExplanatory" xlink:label="ts_DelistingOfSharesFromStockExchangeExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DelistingOfSharesFromStockExchangeExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-31-fees-paid-to-the-companys-principal-accountant" xlink:href="ts-20191231.xsd#statement-note-31-fees-paid-to-the-companys-principal-accountant" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-31-fees-paid-to-the-companys-principal-accountant" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfAdditionalInformationExplanatory" xlink:label="ifrs-full_DisclosureOfAdditionalInformationExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfAdditionalInformationExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-28-cash-flow-disclosures" xlink:href="ts-20191231.xsd#statement-note-28-cash-flow-disclosures" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-28-cash-flow-disclosures" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfCashFlowStatementExplanatory" xlink:label="ifrs-full_DisclosureOfCashFlowStatementExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfCashFlowStatementExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-23-current-allowances-and-provisions" xlink:href="ts-20191231.xsd#statement-note-23-current-allowances-and-provisions" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-23-current-allowances-and-provisions" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfCurrentAllowancesAndProvisionsTextBlock" xlink:label="ts_DisclosureOfCurrentAllowancesAndProvisionsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfCurrentAllowancesAndProvisionsTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-22-noncurrent-allowances-and-provisions" xlink:href="ts-20191231.xsd#statement-note-22-noncurrent-allowances-and-provisions" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-22-noncurrent-allowances-and-provisions" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfNoncurrentAllowancesAndProvisionsTextBlock" xlink:label="ts_DisclosureOfNoncurrentAllowancesAndProvisionsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfNoncurrentAllowancesAndProvisionsTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-19-borrowings" xlink:href="ts-20191231.xsd#statement-note-19-borrowings" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-19-borrowings" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:label="ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-18-cash-and-cash-equivalents-and-other-investments" xlink:href="ts-20191231.xsd#statement-note-18-cash-and-cash-equivalents-and-other-investments" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-18-cash-and-cash-equivalents-and-other-investments" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfCashAndCashEquivalentsAndOtherInvestmentsTextBlock" xlink:label="ts_DisclosureOfCashAndCashEquivalentsAndOtherInvestmentsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfCashAndCashEquivalentsAndOtherInvestmentsTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-17-trade-receivables-net" xlink:href="ts-20191231.xsd#statement-note-17-trade-receivables-net" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-17-trade-receivables-net" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:label="ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-16-current-tax-assets-and-liabilities" xlink:href="ts-20191231.xsd#statement-note-16-current-tax-assets-and-liabilities" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-16-current-tax-assets-and-liabilities" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTaxReceivablesAndPayablesExplanatory" xlink:label="ifrs-full_DisclosureOfTaxReceivablesAndPayablesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfTaxReceivablesAndPayablesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-15-receivables-and-prepayments-net" xlink:href="ts-20191231.xsd#statement-note-15-receivables-and-prepayments-net" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-15-receivables-and-prepayments-net" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfReceivablesAndPrepaymentsTextBlock" xlink:label="ts_DisclosureOfReceivablesAndPrepaymentsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfReceivablesAndPrepaymentsTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-5-other-operating-income-and-expenses" xlink:href="ts-20191231.xsd#statement-note-5-other-operating-income-and-expenses" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-5-other-operating-income-and-expenses" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory" xlink:label="ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-14-inventories-net" xlink:href="ts-20191231.xsd#statement-note-14-inventories-net" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-14-inventories-net" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfInventoriesExplanatory" xlink:label="ifrs-full_DisclosureOfInventoriesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfInventoriesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-13-receivables-non-current" xlink:href="ts-20191231.xsd#statement-note-13-receivables-non-current" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-13-receivables-non-current" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfNoncurrentReceivablesTextBlock" xlink:label="ts_DisclosureOfNoncurrentReceivablesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfNoncurrentReceivablesTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-4-labor-costs-labor-costs-included-in-cost-of-sales-and-in-selling-general-and-administrative-expenses" xlink:href="ts-20191231.xsd#statement-note-4-labor-costs-labor-costs-included-in-cost-of-sales-and-in-selling-general-and-administrative-expenses" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-4-labor-costs-labor-costs-included-in-cost-of-sales-and-in-selling-general-and-administrative-expenses" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfEmployeeBenefitsExplanatory" xlink:label="ifrs-full_DisclosureOfEmployeeBenefitsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfEmployeeBenefitsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-3-selling-general-and-administrative-expenses" xlink:href="ts-20191231.xsd#statement-note-3-selling-general-and-administrative-expenses" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-3-selling-general-and-administrative-expenses" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfGeneralAndAdministrativeExpenseExplanatory" xlink:label="ifrs-full_DisclosureOfGeneralAndAdministrativeExpenseExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfGeneralAndAdministrativeExpenseExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-2-cost-of-sales" xlink:href="ts-20191231.xsd#statement-note-2-cost-of-sales" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-2-cost-of-sales" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfCostOfSalesExplanatory" xlink:label="ifrs-full_DisclosureOfCostOfSalesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfCostOfSalesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-i-general-information" xlink:href="ts-20191231.xsd#statement-i-general-information" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-i-general-information" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory" xlink:label="ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-document-and-entity-information" xlink:href="ts-20191231.xsd#statement-document-and-entity-information" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-document-and-entity-information" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentInformationLineItems" xlink:label="dei_DocumentInformationLineItems" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentInformationTable" xlink:label="dei_DocumentInformationTable" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType" xlink:label="dei_DocumentType" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityInteractiveDataCurrent" xlink:label="dei_EntityInteractiveDataCurrent" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityShellCompany" xlink:label="dei_EntityShellCompany" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityVoluntaryFilers" xlink:label="dei_EntityVoluntaryFilers" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="dei_EntityWellKnownSeasonedIssuer" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle" xlink:type="locator"/>
	<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentAnnualReport" xlink:label="dei_DocumentAnnualReport" xlink:type="locator"/>
	<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentTransitionReport" xlink:label="dei_DocumentTransitionReport" xlink:type="locator"/>
	<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentShellCompanyReport" xlink:label="dei_DocumentShellCompanyReport" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="dei_DocumentInformationTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentInformationTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityRegistrantName" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCentralIndexKey" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_TradingSymbol" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_CurrentFiscalYearEndDate" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityFilerCategory" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCurrentReportingStatus" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityVoluntaryFilers" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityWellKnownSeasonedIssuer" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityEmergingGrowthCompany" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityInteractiveDataCurrent" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCommonStockSharesOutstanding" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityShellCompany" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentType" xlink:type="arc"/>
    <link:definitionArc order="15" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentPeriodEndDate" xlink:type="arc"/>
    <link:definitionArc order="16" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFiscalYearFocus" xlink:type="arc"/>
    <link:definitionArc order="17" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFiscalPeriodFocus" xlink:type="arc"/>
    <link:definitionArc order="18" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AmendmentFlag" xlink:type="arc"/>
    <link:definitionArc order="19" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_Security12bTitle" xlink:type="arc"/>
	<link:definitionArc order="30" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentAnnualReport" xlink:type="arc"/>
	<link:definitionArc order="31" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentTransitionReport" xlink:type="arc"/>
	<link:definitionArc order="32" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentShellCompanyReport" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-consolidated-statement-of-changes-in-equity-parentheticals" xlink:href="ts-20191231.xsd#statement-consolidated-statement-of-changes-in-equity-parentheticals" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-consolidated-statement-of-changes-in-equity-parentheticals" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesAuthorised" xlink:label="ifrs-full_NumberOfSharesAuthorised" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesIssued" xlink:label="ifrs-full_NumberOfSharesIssued" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ParValuePerShare" xlink:label="ifrs-full_ParValuePerShare" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NumberOfSharesAuthorised" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ParValuePerShare" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NumberOfSharesIssued" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-ii-accounting-policies" xlink:href="ts-20191231.xsd#statement-ii-accounting-policies" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-ii-accounting-policies" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_IT" xlink:label="country_IT" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:label="country_US" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:label="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="ifrs-full_ClassesOfShareCapitalAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:label="ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis" xlink:label="ifrs-full_DefinedBenefitPlansAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory" xlink:label="ifrs-full_DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:label="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:label="ifrs-full_EntitysTotalForCashgeneratingUnitsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:label="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsAndGoodwillMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_JointVenturesAxis" xlink:label="ifrs-full_JointVenturesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OrdinarySharesMember" xlink:label="ifrs-full_OrdinarySharesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PreferenceSharesMember" xlink:label="ifrs-full_PreferenceSharesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:label="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfContractsAxis" xlink:label="ifrs-full_TypesOfContractsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfContractsMember" xlink:label="ifrs-full_TypesOfContractsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfContractsMember" xlink:label="ifrs-full_TypesOfContractsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_Canada1Member" xlink:label="ts_Canada1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:label="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConfabMember" xlink:label="ts_ConfabMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FundedPostemploymentBenefitsMember" xlink:label="ts_FundedPostemploymentBenefitsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_HydrillAcquisitionMember" xlink:label="ts_HydrillAcquisitionMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_InformationSystemProjectsMember" xlink:label="ts_InformationSystemProjectsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LicensesPatentsTrademarksAndProprietaryTechnologyMember" xlink:label="ts_LicensesPatentsTrademarksAndProprietaryTechnologyMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MaverickAcquisitionMember" xlink:label="ts_MaverickAcquisitionMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NSSMCMember" xlink:label="ts_NSSMCMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OCTGUSAMember" xlink:label="ts_OCTGUSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PrevidenciaUsiminasMember" xlink:label="ts_PrevidenciaUsiminasMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SaudiSteelPipeCompanyMember" xlink:label="ts_SaudiSteelPipeCompanyMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TTGroupMember" xlink:label="ts_TTGroupMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TechgenSAMember" xlink:label="ts_TechgenSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TecpetrolInternationalSAMember" xlink:label="ts_TecpetrolInternationalSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisMember" xlink:label="ts_TenarisMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TerniumEntititesMember" xlink:label="ts_TerniumEntititesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TerniumSAMember" xlink:label="ts_TerniumSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TheNewSHAMember" xlink:label="ts_TheNewSHAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TrademarksMember" xlink:label="ts_TrademarksMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UnfundedDefinedBenefitEmployeeRetirementPlanForCertainSeniorOfficersMember" xlink:label="ts_UnfundedDefinedBenefitEmployeeRetirementPlanForCertainSeniorOfficersMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UsiminasMember" xlink:label="ts_UsiminasMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfContractsAxis" xlink:to="ifrs-full_TypesOfContractsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:to="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_UsiminasMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfShareCapitalAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_PreferenceSharesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_OrdinarySharesMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_UsiminasMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfContractsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfContractsMember" xlink:to="ts_TheNewSHAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfContractsAxis" xlink:to="ifrs-full_TypesOfContractsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TTGroupMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TerniumEntititesMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_ConfabMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_NSSMCMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_PrevidenciaUsiminasMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_JointVenturesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="ts_TechgenSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember-default" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TecpetrolInternationalSAMember" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TenarisMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_RangeAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_TopOfRangeMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember-default" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ts_InformationSystemProjectsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsAndGoodwillMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ts_LicensesPatentsTrademarksAndProprietaryTechnologyMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ts_TrademarksMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_MaverickAcquisitionMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_HydrillAcquisitionMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_SaudiSteelPipeCompanyMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_BottomOfRangeMember" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:to="ts_OCTGUSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:to="ifrs-full_EntitysTotalForCashgeneratingUnitsMember-default" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_DefinedBenefitPlansAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_UnfundedDefinedBenefitEmployeeRetirementPlanForCertainSeniorOfficersMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_IT" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_FundedPostemploymentBenefitsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_Canada1Member" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_US" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-iii-financial-risk-management" xlink:href="ts-20191231.xsd#statement-iii-financial-risk-management" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-iii-financial-risk-management" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:label="country_US" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="currency_AllCurrenciesDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="currency_AllCurrenciesDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ifrs-full_ClassesOfProvisionsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialGuaranteeContractsMember" xlink:label="ifrs-full_FinancialGuaranteeContractsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FixedInterestRateMember" xlink:label="ifrs-full_FixedInterestRateMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsAxis" xlink:label="ifrs-full_HedgingInstrumentsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsMember" xlink:label="ifrs-full_HedgingInstrumentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsMember" xlink:label="ifrs-full_HedgingInstrumentsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PastDueStatusAxis" xlink:label="ifrs-full_PastDueStatusAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PastDueStatusMember" xlink:label="ifrs-full_PastDueStatusMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PastDueStatusMember" xlink:label="ifrs-full_PastDueStatusMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfInterestRatesAxis" xlink:label="ifrs-full_TypesOfInterestRatesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="ifrs-full_TypesOfRisksAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CurrencyAxis" xlink:label="srt_CurrencyAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AllowanceForDoubtfulAccountsTradeReceivablesMember" xlink:label="ts_AllowanceForDoubtfulAccountsTradeReceivablesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CounterpartyRiskMember" xlink:label="ts_CounterpartyRiskMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CustomerConcentrationRisk1Member" xlink:label="ts_CustomerConcentrationRisk1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeDerivativesContractsMember" xlink:label="ts_ForeignExchangeDerivativesContractsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_GuaranteesUnderCreditInsuranceMember" xlink:label="ts_GuaranteesUnderCreditInsuranceMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LetterOfCreditAndOtherBankGuaranteesMember" xlink:label="ts_LetterOfCreditAndOtherBankGuaranteesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OnePercentChangeArgentinePesoUsDollarForeignExchangeRiskMember" xlink:label="ts_OnePercentChangeArgentinePesoUsDollarForeignExchangeRiskMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OnePercentChangeEuroUsDollarForeignExchangeRiskMember" xlink:label="ts_OnePercentChangeEuroUsDollarForeignExchangeRiskMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OnePercentChangeSaudiArabianRiyalUsDollarForeignExchangeRiskMember" xlink:label="ts_OnePercentChangeSaudiArabianRiyalUsDollarForeignExchangeRiskMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherGuaranteesMember" xlink:label="ts_OtherGuaranteesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PastDueMember" xlink:label="ts_PastDueMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_PastDueStatusAxis" xlink:to="ifrs-full_PastDueStatusMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_HedgingInstrumentsAxis" xlink:to="ifrs-full_HedgingInstrumentsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_CurrencyAxis" xlink:to="currency_AllCurrenciesDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfRisksAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_OnePercentChangeArgentinePesoUsDollarForeignExchangeRiskMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_OnePercentChangeEuroUsDollarForeignExchangeRiskMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_OnePercentChangeSaudiArabianRiyalUsDollarForeignExchangeRiskMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_HedgingInstrumentsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeDerivativesContractsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_HedgingInstrumentsAxis" xlink:to="ifrs-full_HedgingInstrumentsMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfInterestRatesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="ifrs-full_FixedInterestRateMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember-default" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_CustomerConcentrationRisk1Member" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ts_GuaranteesUnderCreditInsuranceMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ts_LetterOfCreditAndOtherBankGuaranteesMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ts_OtherGuaranteesMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_PastDueStatusAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PastDueStatusMember" xlink:to="ts_PastDueMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_PastDueStatusAxis" xlink:to="ifrs-full_PastDueStatusMember-default" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ifrs-full_FinancialGuaranteeContractsMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfProvisionsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="ts_AllowanceForDoubtfulAccountsTradeReceivablesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember-default" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_CounterpartyRiskMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="srt_CurrencyAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="country_US" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_CurrencyAxis" xlink:to="currency_AllCurrenciesDomain-default" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-1-segment-information" xlink:href="ts-20191231.xsd#statement-note-1-segment-information" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-1-segment-information" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_LU" xlink:label="country_LU" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:label="country_US" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:label="ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:label="ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GovernmentCustomersMember" xlink:label="ifrs-full_GovernmentCustomersMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentConsolidationItemsAxis" xlink:label="ifrs-full_SegmentConsolidationItemsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfCustomersAxis" xlink:label="ifrs-full_TypesOfCustomersAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfCustomersMember" xlink:label="ifrs-full_TypesOfCustomersMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfCustomersMember" xlink:label="ifrs-full_TypesOfCustomersMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_Argentina1Member" xlink:label="ts_Argentina1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisMember" xlink:label="ts_TenarisMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfCustomersAxis" xlink:to="ifrs-full_TypesOfCustomersMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentConsolidationItemsAxis" xlink:to="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SegmentConsolidationItemsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentConsolidationItemsAxis" xlink:to="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_LU" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_US" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_Argentina1Member" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TenarisMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfCustomersAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfCustomersMember" xlink:to="ifrs-full_GovernmentCustomersMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfCustomersAxis" xlink:to="ifrs-full_TypesOfCustomersMember-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-6-financial-results" xlink:href="ts-20191231.xsd#statement-note-6-financial-results" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-6-financial-results" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:label="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:label="ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:label="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsCategoryMember" xlink:label="ifrs-full_FinancialAssetsCategoryMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsCategoryMember" xlink:label="ifrs-full_FinancialAssetsCategoryMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsCategoryMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsCategoryMember" xlink:to="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsCategoryMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-7-income-tax" xlink:href="ts-20191231.xsd#statement-note-7-income-tax" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-7-income-tax" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_AR" xlink:label="country_AR" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:label="country_US" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:label="ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_AR" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_US" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-8-dividends-distribution" xlink:href="ts-20191231.xsd#statement-note-8-dividends-distribution" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-8-dividends-distribution" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDividendsExplanatory" xlink:label="ifrs-full_DisclosureOfDividendsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfDividendsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-9-property-plant-and-equipment-net" xlink:href="ts-20191231.xsd#statement-note-9-property-plant-and-equipment-net" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-9-property-plant-and-equipment-net" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-10-intangible-assets-net" xlink:href="ts-20191231.xsd#statement-note-10-intangible-assets-net" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-10-intangible-assets-net" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsExplanatory" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_Europe1Member" xlink:label="ts_Europe1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MiddleEastAndAfricaMember" xlink:label="ts_MiddleEastAndAfricaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NorthAmerica1Member" xlink:label="ts_NorthAmerica1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SouthAmerica1Member" xlink:label="ts_SouthAmerica1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_NorthAmerica1Member" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_SouthAmerica1Member" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_Europe1Member" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_MiddleEastAndAfricaMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfIntangibleAssetsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-11-rightofuse-assets-net-and-lease-liabilities" xlink:href="ts-20191231.xsd#statement-note-11-rightofuse-assets-net-and-lease-liabilities" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-11-rightofuse-assets-net-and-lease-liabilities" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfLeasesExplanatory" xlink:label="ifrs-full_DisclosureOfLeasesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanFiveYearsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="ifrs-full_MaturityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NotLaterThanOneYearMember" xlink:label="ifrs-full_NotLaterThanOneYearMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_MaturityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_NotLaterThanOneYearMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanFiveYearsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfLeasesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-12-investments-in-nonconsolidated-companies" xlink:href="ts-20191231.xsd#statement-note-12-investments-in-nonconsolidated-companies" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-12-investments-in-nonconsolidated-companies" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="ifrs-full_ClassesOfShareCapitalAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:label="ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OrdinarySharesMember" xlink:label="ifrs-full_OrdinarySharesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PreferenceSharesMember" xlink:label="ifrs-full_PreferenceSharesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:label="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:label="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SeveralBanksToRefinanceObligationsMember" xlink:label="ts_SeveralBanksToRefinanceObligationsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TechgenSAMember" xlink:label="ts_TechgenSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TecpetrolInternationalSAMember" xlink:label="ts_TecpetrolInternationalSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TerniumAndUsiminasMember" xlink:label="ts_TerniumAndUsiminasMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TerniumSAMember" xlink:label="ts_TerniumSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UsiminasMember" xlink:label="ts_UsiminasMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_TerniumAndUsiminasMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_UsiminasMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfShareCapitalAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_OrdinarySharesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_PreferenceSharesMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_TechgenSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="ts_TecpetrolInternationalSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BorrowingsByNameAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="ts_SeveralBanksToRefinanceObligationsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember-default" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TechgenSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-20-deferred-income-tax" xlink:href="ts-20191231.xsd#statement-note-20-deferred-income-tax" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-20-deferred-income-tax" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:label="country_US" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:label="ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_US" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities" xlink:href="ts-20191231.xsd#statement-note-21-other-liabilities" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionOfDiscountRatesMember" xlink:label="ifrs-full_ActuarialAssumptionOfDiscountRatesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember" xlink:label="ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsAxis" xlink:label="ifrs-full_ActuarialAssumptionsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsMember" xlink:label="ifrs-full_ActuarialAssumptionsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsMember" xlink:label="ifrs-full_ActuarialAssumptionsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis" xlink:label="ifrs-full_DefinedBenefitPlansAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOtherLiabilitiesExplanatory" xlink:label="ifrs-full_DisclosureOfOtherLiabilitiesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FundedPostemploymentBenefitsMember" xlink:label="ts_FundedPostemploymentBenefitsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UnfundedPostemploymentBenefitsMember" xlink:label="ts_UnfundedPostemploymentBenefitsMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ActuarialAssumptionsAxis" xlink:to="ifrs-full_ActuarialAssumptionsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_DefinedBenefitPlansAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_UnfundedPostemploymentBenefitsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ActuarialAssumptionsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ActuarialAssumptionsMember" xlink:to="ifrs-full_ActuarialAssumptionOfDiscountRatesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ActuarialAssumptionsAxis" xlink:to="ifrs-full_ActuarialAssumptionsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ActuarialAssumptionsMember" xlink:to="ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_FundedPostemploymentBenefitsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfOtherLiabilitiesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-24-derivative-financial-instruments" xlink:href="ts-20191231.xsd#statement-note-24-derivative-financial-instruments" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-24-derivative-financial-instruments" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDerivativeFinancialInstrumentsExplanatory" xlink:label="ifrs-full_DisclosureOfDerivativeFinancialInstrumentsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfDerivativeFinancialInstrumentsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-25-contingencies-commitments-and-restrictions-on-the-distribution-of-profits" xlink:href="ts-20191231.xsd#statement-note-25-contingencies-commitments-and-restrictions-on-the-distribution-of-profits" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-25-contingencies-commitments-and-restrictions-on-the-distribution-of-profits" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_BR" xlink:label="country_BR" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_IT" xlink:label="country_IT" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContingentLiabilitiesMember" xlink:label="ifrs-full_ContingentLiabilitiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContingentLiabilitiesMember" xlink:label="ifrs-full_ContingentLiabilitiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory" xlink:label="ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LegalProceedingsContingentLiabilityMember" xlink:label="ifrs-full_LegalProceedingsContingentLiabilityMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:label="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TaxContingentLiabilityMember" xlink:label="ifrs-full_TaxContingentLiabilityMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="srt_CounterpartyNameAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AirLiquideMexicoSDeRLDeCVMember" xlink:label="ts_AirLiquideMexicoSDeRLDeCVMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CanadianNationalRailwayMember" xlink:label="ts_CanadianNationalRailwayMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ChubbMember" xlink:label="ts_ChubbMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CompanhiaSiderrgicaNacionalMember" xlink:label="ts_CompanhiaSiderrgicaNacionalMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:label="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConfabMember" xlink:label="ts_ConfabMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DalmineSPAMember" xlink:label="ts_DalmineSPAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_GraftechMember" xlink:label="ts_GraftechMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NucorSteelMemphisIncMember" xlink:label="ts_NucorSteelMemphisIncMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PraxairSAMember" xlink:label="ts_PraxairSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxContingentLiabilityRelatedToFiscalYear2014InterestAndPenaltiesMember" xlink:label="ts_TaxContingentLiabilityRelatedToFiscalYear2014InterestAndPenaltiesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxContingentLiabilityRelatedToFiscalYear2014Member" xlink:label="ts_TaxContingentLiabilityRelatedToFiscalYear2014Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxContingentLiabilityRelatedToFiscalYear2014PrincipalMember" xlink:label="ts_TaxContingentLiabilityRelatedToFiscalYear2014PrincipalMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxContingentLiabilityRelatedToFiscalYear2015InterestAndPenaltiesMember" xlink:label="ts_TaxContingentLiabilityRelatedToFiscalYear2015InterestAndPenaltiesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxContingentLiabilityRelatedToFiscalYear2015Member" xlink:label="ts_TaxContingentLiabilityRelatedToFiscalYear2015Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxContingentLiabilityRelatedToFiscalYear2015PrincipalMember" xlink:label="ts_TaxContingentLiabilityRelatedToFiscalYear2015PrincipalMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TechgenSAMember" xlink:label="ts_TechgenSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TerniumSAMember" xlink:label="ts_TerniumSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TransportadoraDeGasDelNorteSaMember" xlink:label="ts_TransportadoraDeGasDelNorteSaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TribunalDeContasDaUniaoMember" xlink:label="ts_TribunalDeContasDaUniaoMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ValeInternationalSAMember" xlink:label="ts_ValeInternationalSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_VeracelCeluloseSaMember" xlink:label="ts_VeracelCeluloseSaMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:to="ifrs-full_ContingentLiabilitiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CounterpartiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_CompanhiaSiderrgicaNacionalMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ifrs-full_LegalProceedingsContingentLiabilityMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:to="ifrs-full_ContingentLiabilitiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_ConfabMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="srt_CounterpartyNameAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="ts_ChubbMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="ts_VeracelCeluloseSaMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_TribunalDeContasDaUniaoMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ifrs-full_TaxContingentLiabilityMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_BR" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ts_TaxContingentLiabilityRelatedToFiscalYear2014Member" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_DalmineSPAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_IT" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ts_TaxContingentLiabilityRelatedToFiscalYear2014PrincipalMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ts_TaxContingentLiabilityRelatedToFiscalYear2014InterestAndPenaltiesMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ts_TaxContingentLiabilityRelatedToFiscalYear2015Member" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ts_TaxContingentLiabilityRelatedToFiscalYear2015PrincipalMember" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ts_TaxContingentLiabilityRelatedToFiscalYear2015InterestAndPenaltiesMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_TransportadoraDeGasDelNorteSaMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_PraxairSAMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_GraftechMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_TechgenSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_ValeInternationalSAMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_CanadianNationalRailwayMember" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_AirLiquideMexicoSDeRLDeCVMember" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_NucorSteelMemphisIncMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-26-agreement-to-build-a-welded-pipe-plant-in-west-siberia" xlink:href="ts-20191231.xsd#statement-note-26-agreement-to-build-a-welded-pipe-plant-in-west-siberia" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-26-agreement-to-build-a-welded-pipe-plant-in-west-siberia" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfJointVenturesExplanatory" xlink:label="ifrs-full_DisclosureOfJointVenturesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_JointVenturesAxis" xlink:label="ifrs-full_JointVenturesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PAOPSeverstalMember" xlink:label="ts_PAOPSeverstalMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_WeldedPipePlantInWestSiberiaMember" xlink:label="ts_WeldedPipePlantInWestSiberiaMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_JointVenturesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="ts_WeldedPipePlantInWestSiberiaMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_PAOPSeverstalMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfJointVenturesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-27-business-combinations" xlink:href="ts-20191231.xsd#statement-note-27-business-combinations" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-27-business-combinations" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfBusinessCombinationsExplanatory" xlink:label="ifrs-full_DisclosureOfBusinessCombinationsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_GarrettMember" xlink:label="ts_GarrettMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SaudiSteelPipeCompanyMember" xlink:label="ts_SaudiSteelPipeCompanyMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_SaudiSteelPipeCompanyMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_GarrettMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfBusinessCombinationsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-29-discontinued-operations" xlink:href="ts-20191231.xsd#statement-note-29-discontinued-operations" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-29-discontinued-operations" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsExplanatory" xlink:label="ifrs-full_DisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-30-related-party-transactions" xlink:href="ts-20191231.xsd#statement-note-30-related-party-transactions" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-30-related-party-transactions" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:label="ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_KeyManagementPersonnelOfEntityOrParentMember" xlink:label="ifrs-full_KeyManagementPersonnelOfEntityOrParentMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SanFaustinSaMember" xlink:label="ts_SanFaustinSaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="ts_SanFaustinSaMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="ifrs-full_KeyManagementPersonnelOfEntityOrParentMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-32-principal-subsidiaries" xlink:href="ts-20191231.xsd#statement-note-32-principal-subsidiaries" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-32-principal-subsidiaries" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfInterestsInSubsidiariesExplanatory" xlink:label="ifrs-full_DisclosureOfInterestsInSubsidiariesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AmajaTubularServicesLimitedMember" xlink:label="ts_AmajaTubularServicesLimitedMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_HydrilCompanyAndSubsidiariesMember" xlink:label="ts_HydrilCompanyAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TechnicalDrillingProductionServicesNigeriaLtdMember" xlink:label="ts_TechnicalDrillingProductionServicesNigeriaLtdMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisSupplyChainSAMember" xlink:label="ts_TenarisSupplyChainSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TubularServicesAngolaLdaMember" xlink:label="ts_TubularServicesAngolaLdaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TubularTechnicalServicesAndPipeCoatersMember" xlink:label="ts_TubularTechnicalServicesAndPipeCoatersMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_HydrilCompanyAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TechnicalDrillingProductionServicesNigeriaLtdMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisSupplyChainSAMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TubularTechnicalServicesAndPipeCoatersMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_AmajaTubularServicesLimitedMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TubularServicesAngolaLdaMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfInterestsInSubsidiariesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-33-nationalization-of-venezuelan-subsidiaries" xlink:href="ts-20191231.xsd#statement-note-33-nationalization-of-venezuelan-subsidiaries" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-33-nationalization-of-venezuelan-subsidiaries" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_VE" xlink:label="country_VE" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfNationalizationOfSubsidiariesTextBlock" xlink:label="ts_DisclosureOfNationalizationOfSubsidiariesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MatesiMaterialesSiderrgicosSaMember" xlink:label="ts_MatesiMaterialesSiderrgicosSaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TavsaAndComsiguaMember" xlink:label="ts_TavsaAndComsiguaMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_MatesiMaterialesSiderrgicosSaMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CounterpartiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="country_VE" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TavsaAndComsiguaMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfNationalizationOfSubsidiariesTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-35-subsequent-events" xlink:href="ts-20191231.xsd#statement-note-35-subsequent-events" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-35-subsequent-events" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:label="ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MajorBusinessCombinationMember" xlink:label="ifrs-full_MajorBusinessCombinationMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AcquisitionOfIPSCOMember" xlink:label="ts_AcquisitionOfIPSCOMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_AcquisitionOfIPSCOMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ifrs-full_MajorBusinessCombinationMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-36-update-as-of-april-29-2020" xlink:href="ts-20191231.xsd#statement-note-36-update-as-of-april-29-2020" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-36-update-as-of-april-29-2020" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MajorBusinessCombinationMember" xlink:label="ifrs-full_MajorBusinessCombinationMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AcquisitionOfIPSCOMember" xlink:label="ts_AcquisitionOfIPSCOMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfEventsAfterReportingPeriodAndApprovalDateTextBlock" xlink:label="ts_DisclosureOfEventsAfterReportingPeriodAndApprovalDateTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_GlobalPandemicMember" xlink:label="ts_GlobalPandemicMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ImpairmentOfAssetsMember" xlink:label="ts_ImpairmentOfAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_JfeMember" xlink:label="ts_JfeMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NetCashPositionMember" xlink:label="ts_NetCashPositionMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NkktubesMember" xlink:label="ts_NkktubesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ts_GlobalPandemicMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ts_NetCashPositionMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ifrs-full_MajorBusinessCombinationMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_AcquisitionOfIPSCOMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ts_ImpairmentOfAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_NkktubesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CounterpartiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_JfeMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfEventsAfterReportingPeriodAndApprovalDateTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-significant-accounting-policies-policies" xlink:href="ts-20191231.xsd#statement-significant-accounting-policies-policies" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-significant-accounting-policies-policies" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForBorrowingsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForBorrowingsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForEarningsPerShareExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForEarningsPerShareExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForExpensesExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForExpensesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForIssuedCapitalExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIssuedCapitalExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" xlink:label="ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DescriptionOfAccountingPolicyForBasisOfPresentationTextBlock" xlink:label="ts_DescriptionOfAccountingPolicyForBasisOfPresentationTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DescriptionOfAccountingPolicyForCurrentAndDeferredIncomeTaxTextBlock" xlink:label="ts_DescriptionOfAccountingPolicyForCurrentAndDeferredIncomeTaxTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:label="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ts_DescriptionOfAccountingPolicyForBasisOfPresentationTextBlock" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForIssuedCapitalExplanatory" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForBorrowingsExplanatory" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ts_DescriptionOfAccountingPolicyForCurrentAndDeferredIncomeTaxTextBlock" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:type="arc"/>
    <link:definitionArc order="15" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory" xlink:type="arc"/>
    <link:definitionArc order="16" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory" xlink:type="arc"/>
    <link:definitionArc order="17" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:type="arc"/>
    <link:definitionArc order="18" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForExpensesExplanatory" xlink:type="arc"/>
    <link:definitionArc order="19" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForEarningsPerShareExplanatory" xlink:type="arc"/>
    <link:definitionArc order="20" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" xlink:type="arc"/>
    <link:definitionArc order="21" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DisclosureOfSignificantAccountingPoliciesAbstract" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-ii-accounting-policies-tables" xlink:href="ts-20191231.xsd#statement-ii-accounting-policies-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-ii-accounting-policies-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AmountByWhichValueAssignedToKeyAssumptionMustChangeInOrderForUnitsRecoverableAmountToBeEqualToCarryingAmountTextBlock" xlink:label="ts_AmountByWhichValueAssignedToKeyAssumptionMustChangeInOrderForUnitsRecoverableAmountToBeEqualToCarryingAmountTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutTheEstimatedUsefulLivesOfPropertyPlantAndEquipmentTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutTheEstimatedUsefulLivesOfPropertyPlantAndEquipmentTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutTheEstimatedUsefulLivesOfPropertyPlantAndEquipmentTextBlock" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_AmountByWhichValueAssignedToKeyAssumptionMustChangeInOrderForUnitsRecoverableAmountToBeEqualToCarryingAmountTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-iii-financial-risk-management-tables" xlink:href="ts-20191231.xsd#statement-iii-financial-risk-management-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-iii-financial-risk-management-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory" xlink:label="ifrs-full_DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfAssetsExplanatory" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfAssetsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsByTypeOfInterestRateExplanatory" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsByTypeOfInterestRateExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutFinancialInstrumentsAtFairValueByCategoryAndLevelsTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutFinancialInstrumentsAtFairValueByCategoryAndLevelsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfFinancialInstrumentsByTypeOfInterestRateExplanatory" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutFinancialInstrumentsAtFairValueByCategoryAndLevelsTextBlock" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfFairValueMeasurementOfAssetsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-1-segment-information-tables" xlink:href="ts-20191231.xsd#statement-note-1-segment-information-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-1-segment-information-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfGeographicalAreasExplanatory" xlink:label="ifrs-full_DisclosureOfGeographicalAreasExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsExplanatory" xlink:label="ifrs-full_DisclosureOfOperatingSegmentsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsAxis" xlink:label="ifrs-full_SegmentsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SegmentRevenuesByMarketExplanatory" xlink:label="ts_SegmentRevenuesByMarketExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TubesMember" xlink:label="ts_TubesMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SegmentsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="ts_TubesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfOperatingSegmentsExplanatory" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfGeographicalAreasExplanatory" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SegmentRevenuesByMarketExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-2-cost-of-sales-tables" xlink:href="ts-20191231.xsd#statement-note-2-cost-of-sales-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-2-cost-of-sales-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutCostOfSalesTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutCostOfSalesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutCostOfSalesTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-3-selling-general-and-administrative-expenses-tables" xlink:href="ts-20191231.xsd#statement-note-3-selling-general-and-administrative-expenses-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-3-selling-general-and-administrative-expenses-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutSellingGeneralAndAdministrativeExpensesTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutSellingGeneralAndAdministrativeExpensesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutSellingGeneralAndAdministrativeExpensesTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-4-labor-costs-labor-costs-included-in-cost-of-sales-and-in-selling-general-and-administrative-expenses-tables" xlink:href="ts-20191231.xsd#statement-note-4-labor-costs-labor-costs-included-in-cost-of-sales-and-in-selling-general-and-administrative-expenses-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-4-labor-costs-labor-costs-included-in-cost-of-sales-and-in-selling-general-and-administrative-expenses-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutLaborCostsTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutLaborCostsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfInformationAboutNumberOfEmployeesTextBlock" xlink:label="ts_DisclosureOfInformationAboutNumberOfEmployeesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutLaborCostsTextBlock" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfInformationAboutNumberOfEmployeesTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-5-other-operating-income-and-expenses-tables" xlink:href="ts-20191231.xsd#statement-note-5-other-operating-income-and-expenses-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-5-other-operating-income-and-expenses-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutOtherOperatingIncomeAndExpensesTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutOtherOperatingIncomeAndExpensesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutOtherOperatingIncomeAndExpensesTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-6-financial-results-tables" xlink:href="ts-20191231.xsd#statement-note-6-financial-results-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-6-financial-results-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutFinancialIncomeCost" xlink:label="ts_DisclosureOfDetailedInformationAboutFinancialIncomeCost" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutFinancialIncomeCost" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-7-income-tax-tables" xlink:href="ts-20191231.xsd#statement-note-7-income-tax-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-7-income-tax-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutIncomeTaxExpenseBenefitTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutIncomeTaxExpenseBenefitTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDifferenceBetweenIncomeBeforeTaxAndTheTheoreticalAmountThatWouldAriseUsingTaxRateInEachCountryTextBlock" xlink:label="ts_DisclosureOfDifferenceBetweenIncomeBeforeTaxAndTheTheoreticalAmountThatWouldAriseUsingTaxRateInEachCountryTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutIncomeTaxExpenseBenefitTextBlock" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDifferenceBetweenIncomeBeforeTaxAndTheTheoreticalAmountThatWouldAriseUsingTaxRateInEachCountryTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-9-property-plant-and-equipment-net-tables" xlink:href="ts-20191231.xsd#statement-note-9-property-plant-and-equipment-net-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-9-property-plant-and-equipment-net-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-10-intangible-assets-net-tables" xlink:href="ts-20191231.xsd#statement-note-10-intangible-assets-net-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-10-intangible-assets-net-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory" xlink:label="ifrs-full_DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory" xlink:label="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-11-rightofuse-assets-net-and-lease-liabilities-tables" xlink:href="ts-20191231.xsd#statement-note-11-rightofuse-assets-net-and-lease-liabilities-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-11-rightofuse-assets-net-and-lease-liabilities-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LeaseLiabilityEvolutionTextBlock" xlink:label="ts_LeaseLiabilityEvolutionTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsEvolutionTextBlock" xlink:label="ts_RightofuseAssetsEvolutionTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_RightofuseAssetsEvolutionTextBlock" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_LeaseLiabilityEvolutionTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-12-investments-in-nonconsolidated-companies-tables" xlink:href="ts-20191231.xsd#statement-note-12-investments-in-nonconsolidated-companies-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-12-investments-in-nonconsolidated-companies-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutInvestmentsInNonconsolidatedCompaniesTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutInvestmentsInNonconsolidatedCompaniesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutPrincipalNonconsolidatedCompaniesTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutPrincipalNonconsolidatedCompaniesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutSelectedFinancialInformationTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutSelectedFinancialInformationTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutInvestmentsInNonconsolidatedCompaniesTextBlock" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutPrincipalNonconsolidatedCompaniesTextBlock" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutSelectedFinancialInformationTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-13-receivables-non-current-tables" xlink:href="ts-20191231.xsd#statement-note-13-receivables-non-current-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-13-receivables-non-current-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutNoncurrentReceivablesTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutNoncurrentReceivablesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutNoncurrentReceivablesTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-14-inventories-net-tables" xlink:href="ts-20191231.xsd#statement-note-14-inventories-net-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-14-inventories-net-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutInventoriesTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutInventoriesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutInventoriesTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-15-receivables-and-prepayments-net-tables" xlink:href="ts-20191231.xsd#statement-note-15-receivables-and-prepayments-net-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-15-receivables-and-prepayments-net-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutReceivablesAndPrepaymentsTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutReceivablesAndPrepaymentsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutReceivablesAndPrepaymentsTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-16-current-tax-assets-and-liabilities-tables" xlink:href="ts-20191231.xsd#statement-note-16-current-tax-assets-and-liabilities-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-16-current-tax-assets-and-liabilities-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutCurrentTaxAssetsTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutCurrentTaxAssetsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutTaxLiabilitiesTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutTaxLiabilitiesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutCurrentTaxAssetsTextBlock" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutTaxLiabilitiesTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-17-trade-receivables-net-tables" xlink:href="ts-20191231.xsd#statement-note-17-trade-receivables-net-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-17-trade-receivables-net-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureIfDetailedInformationAboutTheAgingOfTradeReceivablesTextBlock" xlink:label="ts_DisclosureIfDetailedInformationAboutTheAgingOfTradeReceivablesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutCurrentTradeReceivablesTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutCurrentTradeReceivablesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutCurrentTradeReceivablesTextBlock" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureIfDetailedInformationAboutTheAgingOfTradeReceivablesTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-18-cash-and-cash-equivalents-and-other-investments-tables" xlink:href="ts-20191231.xsd#statement-note-18-cash-and-cash-equivalents-and-other-investments-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-18-cash-and-cash-equivalents-and-other-investments-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DetailedDisclosureOfCashAndCashEquivalentsAndOtherInvestmentsTextBlock" xlink:label="ts_DetailedDisclosureOfCashAndCashEquivalentsAndOtherInvestmentsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DetailedDisclosureOfCashAndCashEquivalentsAndOtherInvestmentsTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-tables" xlink:href="ts-20191231.xsd#statement-note-19-borrowings-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfBorrowingsEvolutionTextBlock" xlink:label="ts_DisclosureOfBorrowingsEvolutionTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutBorrowingsByCurrencyAndRateTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutBorrowingsByCurrencyAndRateTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutSignificantBorrowingsTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutSignificantBorrowingsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutTheMaturityOfBorrowingsTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutTheMaturityOfBorrowingsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutWeightedAverageInterestRatesOfBorrowingsTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutWeightedAverageInterestRatesOfBorrowingsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutTheMaturityOfBorrowingsTextBlock" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutSignificantBorrowingsTextBlock" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutWeightedAverageInterestRatesOfBorrowingsTextBlock" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutBorrowingsByCurrencyAndRateTextBlock" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfBorrowingsEvolutionTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-20-deferred-income-tax-tables" xlink:href="ts-20191231.xsd#statement-note-20-deferred-income-tax-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-20-deferred-income-tax-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxTextBlock" xlink:label="ts_DeferredTaxTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDeferredTaxAssetsAndLiabilitiesTextBlock" xlink:label="ts_DisclosureOfDeferredTaxAssetsAndLiabilitiesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfRecoveryAnalysisOfDeferredTaxAssetsAndLiabilitiesTextBlock" xlink:label="ts_DisclosureOfRecoveryAnalysisOfDeferredTaxAssetsAndLiabilitiesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDeferredTaxAssetsAndLiabilitiesTextBlock" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfRecoveryAnalysisOfDeferredTaxAssetsAndLiabilitiesTextBlock" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DeferredTaxTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-tables" xlink:href="ts-20191231.xsd#statement-note-21-other-liabilities-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFairValueOfPlanAssetsExplanatory" xlink:label="ifrs-full_DisclosureOfFairValueOfPlanAssetsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory" xlink:label="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOtherCurrentLiabilitiesExplanatory" xlink:label="ifrs-full_DisclosureOfOtherCurrentLiabilitiesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOtherNoncurrentLiabilitiesExplanatory" xlink:label="ifrs-full_DisclosureOfOtherNoncurrentLiabilitiesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfActuarialAssumptionsTextBlock" xlink:label="ts_DisclosureOfActuarialAssumptionsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfOtherNoncurrentLiabilitiesExplanatory" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfActuarialAssumptionsTextBlock" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfFairValueOfPlanAssetsExplanatory" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfOtherCurrentLiabilitiesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-22-noncurrent-allowances-and-provisions-tables" xlink:href="ts-20191231.xsd#statement-note-22-noncurrent-allowances-and-provisions-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-22-noncurrent-allowances-and-provisions-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutNoncurrentAllowancesAndProvisionsDeductedFromNoncurrentReceivablesTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutNoncurrentAllowancesAndProvisionsDeductedFromNoncurrentReceivablesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutNoncurrentAllowancesAndProvisionsFromLiabilitiesTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutNoncurrentAllowancesAndProvisionsFromLiabilitiesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutNoncurrentAllowancesAndProvisionsDeductedFromNoncurrentReceivablesTextBlock" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutNoncurrentAllowancesAndProvisionsFromLiabilitiesTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-23-current-allowances-and-provisions-tables" xlink:href="ts-20191231.xsd#statement-note-23-current-allowances-and-provisions-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-23-current-allowances-and-provisions-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutCurrentAllowancesAndProvisionsDeductedFromAssetsTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutCurrentAllowancesAndProvisionsDeductedFromAssetsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutCurrentAllowancesAndProvisionsFromLiabilitiesTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutCurrentAllowancesAndProvisionsFromLiabilitiesTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutCurrentAllowancesAndProvisionsDeductedFromAssetsTextBlock" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutCurrentAllowancesAndProvisionsFromLiabilitiesTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-24-derivative-financial-instruments-tables" xlink:href="ts-20191231.xsd#statement-note-24-derivative-financial-instruments-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-24-derivative-financial-instruments-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutHedgedItemsExplanatory" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutHedgedItemsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutDerivativeFinancialInstrumentsTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutDerivativeFinancialInstrumentsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationOfTheHedgeReserveEvolutionTextBlock" xlink:label="ts_DisclosureOfDetailedInformationOfTheHedgeReserveEvolutionTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutDerivativeFinancialInstrumentsTextBlock" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutHedgedItemsExplanatory" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationOfTheHedgeReserveEvolutionTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-27-business-combinations-tables" xlink:href="ts-20191231.xsd#statement-note-27-business-combinations-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-27-business-combinations-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SaudiSteelPipeCompanyMember" xlink:label="ts_SaudiSteelPipeCompanyMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_SaudiSteelPipeCompanyMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-28-cash-flow-disclosures-tables" xlink:href="ts-20191231.xsd#statement-note-28-cash-flow-disclosures-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-28-cash-flow-disclosures-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDetailedInformationAboutCashFlowDisclosuresTextBlock" xlink:label="ts_DisclosureOfDetailedInformationAboutCashFlowDisclosuresTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDetailedInformationAboutCashFlowDisclosuresTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-29-discontinued-operations-tables" xlink:href="ts-20191231.xsd#statement-note-29-discontinued-operations-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-29-discontinued-operations-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDiscontinuedOperationsExplanatory" xlink:label="ifrs-full_DisclosureOfDiscontinuedOperationsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfDiscontinuedOperationsNetIncomeComponentsTextBlock" xlink:label="ts_DisclosureOfDiscontinuedOperationsNetIncomeComponentsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfSaleOfDiscontinuedOperationsTextBlock" xlink:label="ts_DisclosureOfSaleOfDiscontinuedOperationsTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfDiscontinuedOperationsNetIncomeComponentsTextBlock" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfSaleOfDiscontinuedOperationsTextBlock" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfDiscontinuedOperationsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-30-related-party-transactions-tables" xlink:href="ts-20191231.xsd#statement-note-30-related-party-transactions-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-30-related-party-transactions-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-31-fees-paid-to-the-companys-principal-accountant-tables" xlink:href="ts-20191231.xsd#statement-note-31-fees-paid-to-the-companys-principal-accountant-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-31-fees-paid-to-the-companys-principal-accountant-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DisclosureOfAuditorsRemunerationTextBlock" xlink:label="ts_DisclosureOfAuditorsRemunerationTextBlock" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DisclosureOfAuditorsRemunerationTextBlock" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-32-principal-subsidiaries-tables" xlink:href="ts-20191231.xsd#statement-note-32-principal-subsidiaries-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-32-principal-subsidiaries-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-36-update-as-of-april-29-2020-tables" xlink:href="ts-20191231.xsd#statement-note-36-update-as-of-april-29-2020-tables" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-36-update-as-of-april-29-2020-tables" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AcquisitionOfIPSCOMember" xlink:label="ts_AcquisitionOfIPSCOMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_AcquisitionOfIPSCOMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-ii-accounting-policies-details-textual" xlink:href="ts-20191231.xsd#statement-ii-accounting-policies-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-ii-accounting-policies-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_IT" xlink:label="country_IT" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:label="country_US" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AmountByWhichUnitsRecoverableAmountExceedsItsCarryingAmount" xlink:label="ifrs-full_AmountByWhichUnitsRecoverableAmountExceedsItsCarryingAmount" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:label="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="ifrs-full_ClassesOfShareCapitalAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:label="ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis" xlink:label="ifrs-full_DefinedBenefitPlansAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse" xlink:label="ifrs-full_DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:label="ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:label="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:label="ifrs-full_EntitysTotalForCashgeneratingUnitsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:label="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwill" xlink:label="ifrs-full_IntangibleAssetsAndGoodwill" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsAndGoodwillMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_JointVenturesAxis" xlink:label="ifrs-full_JointVenturesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:label="ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesAuthorised" xlink:label="ifrs-full_NumberOfSharesAuthorised" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesIssued" xlink:label="ifrs-full_NumberOfSharesIssued" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesOutstanding" xlink:label="ifrs-full_NumberOfSharesOutstanding" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OrdinarySharesMember" xlink:label="ifrs-full_OrdinarySharesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ParValuePerShare" xlink:label="ifrs-full_ParValuePerShare" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PreferenceSharesMember" xlink:label="ifrs-full_PreferenceSharesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:label="ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:label="ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfVotingPowerHeldInAssociate" xlink:label="ifrs-full_ProportionOfVotingPowerHeldInAssociate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RemainingAmortisationPeriodOfIntangibleAssetsMaterialToEntity2019" xlink:label="ifrs-full_RemainingAmortisationPeriodOfIntangibleAssetsMaterialToEntity2019" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ResearchAndDevelopmentExpense" xlink:label="ifrs-full_ResearchAndDevelopmentExpense" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:label="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfContractsAxis" xlink:label="ifrs-full_TypesOfContractsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfContractsMember" xlink:label="ifrs-full_TypesOfContractsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfContractsMember" xlink:label="ifrs-full_TypesOfContractsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_Canada1Member" xlink:label="ts_Canada1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CarryingValueOfUnitsGranted" xlink:label="ts_CarryingValueOfUnitsGranted" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:label="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConfabMember" xlink:label="ts_ConfabMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EmployeeBenefitsCompanyRedemptionPeriod" xlink:label="ts_EmployeeBenefitsCompanyRedemptionPeriod" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EmployeeBenefitsEarlyRedemptionPeriod" xlink:label="ts_EmployeeBenefitsEarlyRedemptionPeriod" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EmployeeBenefitsUnitVestingPeriod" xlink:label="ts_EmployeeBenefitsUnitVestingPeriod" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FinitelivedIntangibleAssetResidualUsefulLife" xlink:label="ts_FinitelivedIntangibleAssetResidualUsefulLife" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FinitelivedIntangibleAssetResidualValue" xlink:label="ts_FinitelivedIntangibleAssetResidualValue" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FinitelivedIntangibleAssetUsefulLife" xlink:label="ts_FinitelivedIntangibleAssetUsefulLife" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FundedPostemploymentBenefitsMember" xlink:label="ts_FundedPostemploymentBenefitsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_HydrillAcquisitionMember" xlink:label="ts_HydrillAcquisitionMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ImpairmentLossOnEquityMethodInvestmentInNonconsolidatedCompanies" xlink:label="ts_ImpairmentLossOnEquityMethodInvestmentInNonconsolidatedCompanies" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_InformationSystemProjectsMember" xlink:label="ts_InformationSystemProjectsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_InterestInAssociateSharesOwned" xlink:label="ts_InterestInAssociateSharesOwned" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LicensesPatentsTrademarksAndProprietaryTechnologyMember" xlink:label="ts_LicensesPatentsTrademarksAndProprietaryTechnologyMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MaverickAcquisitionMember" xlink:label="ts_MaverickAcquisitionMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NSSMCMember" xlink:label="ts_NSSMCMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NetDefinedContributionPlanLiabilityAssetAtEndOfPeriod" xlink:label="ts_NetDefinedContributionPlanLiabilityAssetAtEndOfPeriod" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NumberOfMajorBusinessSegments" xlink:label="ts_NumberOfMajorBusinessSegments" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NumberOfReportableOperatingSegments" xlink:label="ts_NumberOfReportableOperatingSegments" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NumberOfSharesSubscribedTo" xlink:label="ts_NumberOfSharesSubscribedTo" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NumberOfVotesPerShare" xlink:label="ts_NumberOfVotesPerShare" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OCTGUSAMember" xlink:label="ts_OCTGUSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PercentOfCompanyVotingCapital" xlink:label="ts_PercentOfCompanyVotingCapital" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PrevidenciaUsiminasMember" xlink:label="ts_PrevidenciaUsiminasMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SaudiSteelPipeCompanyMember" xlink:label="ts_SaudiSteelPipeCompanyMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesAmortizationOfIntangibleAssets" xlink:label="ts_SellingGeneralAndAdministrativeExpensesAmortizationOfIntangibleAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SharesBoundToSHA" xlink:label="ts_SharesBoundToSHA" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SharesSubscribedToPricePerShare" xlink:label="ts_SharesSubscribedToPricePerShare" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SharesSubscribedToValue" xlink:label="ts_SharesSubscribedToValue" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TTGroupMember" xlink:label="ts_TTGroupMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TechgenSAMember" xlink:label="ts_TechgenSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TecpetrolInternationalSAMember" xlink:label="ts_TecpetrolInternationalSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisMember" xlink:label="ts_TenarisMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TerniumEntititesMember" xlink:label="ts_TerniumEntititesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TerniumSAMember" xlink:label="ts_TerniumSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TheNewSHAMember" xlink:label="ts_TheNewSHAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TrademarksMember" xlink:label="ts_TrademarksMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UnfundedDefinedBenefitEmployeeRetirementPlanForCertainSeniorOfficersMember" xlink:label="ts_UnfundedDefinedBenefitEmployeeRetirementPlanForCertainSeniorOfficersMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UsiminasMember" xlink:label="ts_UsiminasMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfContractsAxis" xlink:to="ifrs-full_TypesOfContractsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:to="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_UsiminasMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfShareCapitalAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_PreferenceSharesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_OrdinarySharesMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_UsiminasMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfContractsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfContractsMember" xlink:to="ts_TheNewSHAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfContractsAxis" xlink:to="ifrs-full_TypesOfContractsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TTGroupMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TerniumEntititesMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_ConfabMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_NSSMCMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_PrevidenciaUsiminasMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_JointVenturesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="ts_TechgenSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember-default" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TecpetrolInternationalSAMember" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TenarisMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_RangeAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_TopOfRangeMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember-default" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ts_InformationSystemProjectsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsAndGoodwillMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ts_LicensesPatentsTrademarksAndProprietaryTechnologyMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ts_TrademarksMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_MaverickAcquisitionMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_HydrillAcquisitionMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_SaudiSteelPipeCompanyMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_BottomOfRangeMember" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:to="ts_OCTGUSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:to="ifrs-full_EntitysTotalForCashgeneratingUnitsMember-default" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_DefinedBenefitPlansAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_UnfundedDefinedBenefitEmployeeRetirementPlanForCertainSeniorOfficersMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_IT" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_FundedPostemploymentBenefitsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_Canada1Member" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_US" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProportionOfVotingPowerHeldInAssociate" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NumberOfSharesSubscribedTo" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SharesSubscribedToPricePerShare" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SharesSubscribedToValue" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_InterestInAssociateSharesOwned" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SharesBoundToSHA" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_PercentOfCompanyVotingCapital" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ImpairmentLossOnEquityMethodInvestmentInNonconsolidatedCompanies" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NumberOfMajorBusinessSegments" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NumberOfReportableOperatingSegments" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_FinitelivedIntangibleAssetUsefulLife" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IntangibleAssetsAndGoodwill" xlink:type="arc"/>
    <link:definitionArc order="15" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ResearchAndDevelopmentExpense" xlink:type="arc"/>
    <link:definitionArc order="16" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_RemainingAmortisationPeriodOfIntangibleAssetsMaterialToEntity2019" xlink:type="arc"/>
    <link:definitionArc order="17" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesAmortizationOfIntangibleAssets" xlink:type="arc"/>
    <link:definitionArc order="18" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_FinitelivedIntangibleAssetResidualValue" xlink:type="arc"/>
    <link:definitionArc order="19" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_FinitelivedIntangibleAssetResidualUsefulLife" xlink:type="arc"/>
    <link:definitionArc order="20" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse" xlink:type="arc"/>
    <link:definitionArc order="21" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AmountByWhichUnitsRecoverableAmountExceedsItsCarryingAmount" xlink:type="arc"/>
    <link:definitionArc order="22" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NumberOfSharesAuthorised" xlink:type="arc"/>
    <link:definitionArc order="23" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ParValuePerShare" xlink:type="arc"/>
    <link:definitionArc order="24" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NumberOfSharesIssued" xlink:type="arc"/>
    <link:definitionArc order="25" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NumberOfSharesOutstanding" xlink:type="arc"/>
    <link:definitionArc order="26" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NumberOfVotesPerShare" xlink:type="arc"/>
    <link:definitionArc order="27" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:type="arc"/>
    <link:definitionArc order="28" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NetDefinedContributionPlanLiabilityAssetAtEndOfPeriod" xlink:type="arc"/>
    <link:definitionArc order="29" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EmployeeBenefitsUnitVestingPeriod" xlink:type="arc"/>
    <link:definitionArc order="30" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EmployeeBenefitsCompanyRedemptionPeriod" xlink:type="arc"/>
    <link:definitionArc order="31" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EmployeeBenefitsEarlyRedemptionPeriod" xlink:type="arc"/>
    <link:definitionArc order="32" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CarryingValueOfUnitsGranted" xlink:type="arc"/>
    <link:definitionArc order="33" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-iii-financial-risk-management-details-textual" xlink:href="ts-20191231.xsd#statement-iii-financial-risk-management-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-iii-financial-risk-management-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:label="country_US" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="currency_AllCurrenciesDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="currency_AllCurrenciesDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Borrowings" xlink:label="ifrs-full_Borrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ifrs-full_ClassesOfProvisionsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CreditExposure" xlink:label="ifrs-full_CreditExposure" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentTradeReceivables" xlink:label="ifrs-full_CurrentTradeReceivables" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialGuaranteeContractsMember" xlink:label="ifrs-full_FinancialGuaranteeContractsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FixedInterestRateMember" xlink:label="ifrs-full_FixedInterestRateMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsAxis" xlink:label="ifrs-full_HedgingInstrumentsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsMember" xlink:label="ifrs-full_HedgingInstrumentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsMember" xlink:label="ifrs-full_HedgingInstrumentsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisions" xlink:label="ifrs-full_OtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PastDueStatusAxis" xlink:label="ifrs-full_PastDueStatusAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PastDueStatusMember" xlink:label="ifrs-full_PastDueStatusMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PastDueStatusMember" xlink:label="ifrs-full_PastDueStatusMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ReserveOfCashFlowHedgesContinuingHedges" xlink:label="ifrs-full_ReserveOfCashFlowHedgesContinuingHedges" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ReserveOfExchangeDifferencesOnTranslation" xlink:label="ifrs-full_ReserveOfExchangeDifferencesOnTranslation" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShorttermBorrowings" xlink:label="ifrs-full_ShorttermBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets" xlink:label="ifrs-full_TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TransfersOutOfLevel2IntoLevel1OfFairValueHierarchyAssets" xlink:label="ifrs-full_TransfersOutOfLevel2IntoLevel1OfFairValueHierarchyAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfInterestRatesAxis" xlink:label="ifrs-full_TypesOfInterestRatesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="ifrs-full_TypesOfRisksAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CurrencyAxis" xlink:label="srt_CurrencyAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AllowanceForDoubtfulAccountsTradeReceivablesMember" xlink:label="ts_AllowanceForDoubtfulAccountsTradeReceivablesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConcentrationRiskPercentage" xlink:label="ts_ConcentrationRiskPercentage" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CounterpartyRiskMember" xlink:label="ts_CounterpartyRiskMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CustomerConcentrationRisk1Member" xlink:label="ts_CustomerConcentrationRisk1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DebtToEquityRatio" xlink:label="ts_DebtToEquityRatio" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FinancialLiabilitiesFairValueAsAPercentageOfCarryingValue" xlink:label="ts_FinancialLiabilitiesFairValueAsAPercentageOfCarryingValue" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeDerivativesContractsMember" xlink:label="ts_ForeignExchangeDerivativesContractsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeRiskCurrencyExposure" xlink:label="ts_ForeignExchangeRiskCurrencyExposure" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_GainLossOnInterestRateRiskIfMarketInterestRatesWereHigher" xlink:label="ts_GainLossOnInterestRateRiskIfMarketInterestRatesWereHigher" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_GuaranteesUnderCreditInsuranceMember" xlink:label="ts_GuaranteesUnderCreditInsuranceMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LetterOfCreditAndOtherBankGuaranteesMember" xlink:label="ts_LetterOfCreditAndOtherBankGuaranteesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LiquidFinancialAssetsPercentage" xlink:label="ts_LiquidFinancialAssetsPercentage" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LiquidFinancialAssetsPercentageDenominatedByASpecificCurrency" xlink:label="ts_LiquidFinancialAssetsPercentageDenominatedByASpecificCurrency" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OnePercentChangeArgentinePesoUsDollarForeignExchangeRiskMember" xlink:label="ts_OnePercentChangeArgentinePesoUsDollarForeignExchangeRiskMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OnePercentChangeEuroUsDollarForeignExchangeRiskMember" xlink:label="ts_OnePercentChangeEuroUsDollarForeignExchangeRiskMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OnePercentChangeSaudiArabianRiyalUsDollarForeignExchangeRiskMember" xlink:label="ts_OnePercentChangeSaudiArabianRiyalUsDollarForeignExchangeRiskMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherGuaranteesMember" xlink:label="ts_OtherGuaranteesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PastDueMember" xlink:label="ts_PastDueMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_PastDueStatusAxis" xlink:to="ifrs-full_PastDueStatusMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_HedgingInstrumentsAxis" xlink:to="ifrs-full_HedgingInstrumentsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_CurrencyAxis" xlink:to="currency_AllCurrenciesDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfRisksAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_OnePercentChangeArgentinePesoUsDollarForeignExchangeRiskMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_OnePercentChangeEuroUsDollarForeignExchangeRiskMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_OnePercentChangeSaudiArabianRiyalUsDollarForeignExchangeRiskMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_HedgingInstrumentsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeDerivativesContractsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_HedgingInstrumentsAxis" xlink:to="ifrs-full_HedgingInstrumentsMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfInterestRatesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="ifrs-full_FixedInterestRateMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember-default" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_CustomerConcentrationRisk1Member" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ts_GuaranteesUnderCreditInsuranceMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ts_LetterOfCreditAndOtherBankGuaranteesMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ts_OtherGuaranteesMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_PastDueStatusAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PastDueStatusMember" xlink:to="ts_PastDueMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_PastDueStatusAxis" xlink:to="ifrs-full_PastDueStatusMember-default" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ifrs-full_FinancialGuaranteeContractsMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfProvisionsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="ts_AllowanceForDoubtfulAccountsTradeReceivablesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember-default" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_CounterpartyRiskMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="srt_CurrencyAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="country_US" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_CurrencyAxis" xlink:to="currency_AllCurrenciesDomain-default" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DebtToEquityRatio" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ForeignExchangeRiskCurrencyExposure" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ReserveOfExchangeDifferencesOnTranslation" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Borrowings" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ShorttermBorrowings" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_GainLossOnInterestRateRiskIfMarketInterestRatesWereHigher" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CreditExposure" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ConcentrationRiskPercentage" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentTradeReceivables" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_LiquidFinancialAssetsPercentage" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_LiquidFinancialAssetsPercentageDenominatedByASpecificCurrency" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_FinancialLiabilitiesFairValueAsAPercentageOfCarryingValue" xlink:type="arc"/>
    <link:definitionArc order="15" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ReserveOfCashFlowHedgesContinuingHedges" xlink:type="arc"/>
    <link:definitionArc order="16" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_TransfersOutOfLevel2IntoLevel1OfFairValueHierarchyAssets" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-1-segment-information-details-textual" xlink:href="ts-20191231.xsd#statement-note-1-segment-information-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-1-segment-information-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_LU" xlink:label="country_LU" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:label="country_US" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContractLiabilities" xlink:label="ifrs-full_ContractLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:label="ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GovernmentCustomersMember" xlink:label="ifrs-full_GovernmentCustomersMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentFinancialAssetsAvailableforsale" xlink:label="ifrs-full_NoncurrentFinancialAssetsAvailableforsale" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PercentageOfEntitysRevenue" xlink:label="ifrs-full_PercentageOfEntitysRevenue" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="ifrs-full_ProfitLossBeforeTax" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentConsolidationItemsAxis" xlink:label="ifrs-full_SegmentConsolidationItemsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfCustomersAxis" xlink:label="ifrs-full_TypesOfCustomersAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfCustomersMember" xlink:label="ifrs-full_TypesOfCustomersMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfCustomersMember" xlink:label="ifrs-full_TypesOfCustomersMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_Argentina1Member" xlink:label="ts_Argentina1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisMember" xlink:label="ts_TenarisMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfCustomersAxis" xlink:to="ifrs-full_TypesOfCustomersMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentConsolidationItemsAxis" xlink:to="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SegmentConsolidationItemsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentConsolidationItemsAxis" xlink:to="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_LU" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_US" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_Argentina1Member" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TenarisMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfCustomersAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfCustomersMember" xlink:to="ifrs-full_GovernmentCustomersMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfCustomersAxis" xlink:to="ifrs-full_TypesOfCustomersMember-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProfitLossBeforeTax" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentFinancialAssetsAvailableforsale" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PercentageOfEntitysRevenue" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ContractLiabilities" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-6-financial-results-details-textual" xlink:href="ts-20191231.xsd#statement-note-6-financial-results-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-6-financial-results-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:label="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:label="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsCategoryMember" xlink:label="ifrs-full_FinancialAssetsCategoryMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsCategoryMember" xlink:label="ifrs-full_FinancialAssetsCategoryMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRevenueExpense" xlink:label="ifrs-full_InterestRevenueExpense" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsCategoryMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsCategoryMember" xlink:to="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsCategoryMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_InterestRevenueExpense" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-7-income-tax-details-textual" xlink:href="ts-20191231.xsd#statement-note-7-income-tax-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-7-income-tax-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_AR" xlink:label="country_AR" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:label="country_US" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes" xlink:label="ifrs-full_DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AfterTaxEffectOfExpenseNotDeductibleInDeterminingProfitLoss" xlink:label="ts_AfterTaxEffectOfExpenseNotDeductibleInDeterminingProfitLoss" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ChargeRelatedToWithholdingTaxesForIntraGroupInternationalOperations" xlink:label="ts_ChargeRelatedToWithholdingTaxesForIntraGroupInternationalOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_AR" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_US" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_AfterTaxEffectOfExpenseNotDeductibleInDeterminingProfitLoss" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ChargeRelatedToWithholdingTaxesForIntraGroupInternationalOperations" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-8-dividends-distribution-details-textual" xlink:href="ts-20191231.xsd#statement-note-8-dividends-distribution-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-8-dividends-distribution-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsPaid" xlink:label="ifrs-full_DividendsPaid" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsPaidOrdinarySharesPerShare" xlink:label="ifrs-full_DividendsPaidOrdinarySharesPerShare" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare" xlink:label="ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DividendsPaidPerADS" xlink:label="ts_DividendsPaidPerADS" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DividendsPayableAmountPerADS" xlink:label="ts_DividendsPayableAmountPerADS" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DividendsPayableAmountPerADSIncludingInterimDividend" xlink:label="ts_DividendsPayableAmountPerADSIncludingInterimDividend" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DividendsPayableAmountPerShareIncludingInterimDividend" xlink:label="ts_DividendsPayableAmountPerShareIncludingInterimDividend" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DividendsPayableAmountPerADS" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DividendsPaid" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DividendsPayableAmountPerShareIncludingInterimDividend" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DividendsPayableAmountPerADSIncludingInterimDividend" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DividendsPaidOrdinarySharesPerShare" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DividendsPaidPerADS" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-9-property-plant-and-equipment-net-details-textual" xlink:href="ts-20191231.xsd#statement-note-9-property-plant-and-equipment-net-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-9-property-plant-and-equipment-net-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PropertyPlantAndEquipmentCapitalizedInterest" xlink:label="ts_PropertyPlantAndEquipmentCapitalizedInterest" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_PropertyPlantAndEquipmentCapitalizedInterest" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-10-intangible-assets-net-details-textual" xlink:href="ts-20191231.xsd#statement-note-10-intangible-assets-net-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-10-intangible-assets-net-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Goodwill" xlink:label="ifrs-full_Goodwill" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_Europe1Member" xlink:label="ts_Europe1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MiddleEastAndAfricaMember" xlink:label="ts_MiddleEastAndAfricaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NorthAmerica1Member" xlink:label="ts_NorthAmerica1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SouthAmerica1Member" xlink:label="ts_SouthAmerica1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_NorthAmerica1Member" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_SouthAmerica1Member" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_Europe1Member" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_MiddleEastAndAfricaMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Goodwill" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-11-rightofuse-assets-net-and-lease-liabilities-details-textual" xlink:href="ts-20191231.xsd#statement-note-11-rightofuse-assets-net-and-lease-liabilities-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-11-rightofuse-assets-net-and-lease-liabilities-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashOutflowForLeases" xlink:label="ifrs-full_CashOutflowForLeases" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed" xlink:label="ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed" xlink:label="ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanFiveYearsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="ifrs-full_MaturityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NotLaterThanOneYearMember" xlink:label="ifrs-full_NotLaterThanOneYearMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_WeightedAverageLesseesIncrementalBorrowingRateAppliedToLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16" xlink:label="ifrs-full_WeightedAverageLesseesIncrementalBorrowingRateAppliedToLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RemainingLeasePaymentsToBeMadePercentage" xlink:label="ts_RemainingLeasePaymentsToBeMadePercentage" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_MaturityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_NotLaterThanOneYearMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanFiveYearsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashOutflowForLeases" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_WeightedAverageLesseesIncrementalBorrowingRateAppliedToLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_RemainingLeasePaymentsToBeMadePercentage" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-12-investments-in-nonconsolidated-companies-details-textual" xlink:href="ts-20191231.xsd#statement-note-12-investments-in-nonconsolidated-companies-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-12-investments-in-nonconsolidated-companies-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="ifrs-full_ClassesOfShareCapitalAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DebtSecurities" xlink:label="ifrs-full_DebtSecurities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsReceivedFromAssociatesClassifiedAsInvestingActivities" xlink:label="ifrs-full_DividendsReceivedFromAssociatesClassifiedAsInvestingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FairValueOfInvestmentsInAssociatesWherePriceQuotationsPublished" xlink:label="ifrs-full_FairValueOfInvestmentsInAssociatesWherePriceQuotationsPublished" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:label="ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LoansAndReceivables" xlink:label="ifrs-full_LoansAndReceivables" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OrdinarySharesMember" xlink:label="ifrs-full_OrdinarySharesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PreferenceSharesMember" xlink:label="ifrs-full_PreferenceSharesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:label="ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfVotingPowerHeldInAssociate" xlink:label="ifrs-full_ProportionOfVotingPowerHeldInAssociate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:label="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ClosingPricePerADS" xlink:label="ts_ClosingPricePerADS" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ClosingPricePerShare" xlink:label="ts_ClosingPricePerShare" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:label="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DebtServiceCoverageRatioCoveredPercent" xlink:label="ts_DebtServiceCoverageRatioCoveredPercent" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LettersOfCreditCovered" xlink:label="ts_LettersOfCreditCovered" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ProceedsFromRepaymentsOfLoansReceivableFromRelatedParties" xlink:label="ts_ProceedsFromRepaymentsOfLoansReceivableFromRelatedParties" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ProportionOfCorporateGuaranteeCoveringObligations" xlink:label="ts_ProportionOfCorporateGuaranteeCoveringObligations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ProvisionForExposureToPurchaseAndOtherServiceAgreements" xlink:label="ts_ProvisionForExposureToPurchaseAndOtherServiceAgreements" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ProvisionForExposureToThePurchaseOfCleanEnergyCertificates" xlink:label="ts_ProvisionForExposureToThePurchaseOfCleanEnergyCertificates" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ProvisionForExposureToTransportationCapacityAgreements" xlink:label="ts_ProvisionForExposureToTransportationCapacityAgreements" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SeveralBanksToRefinanceObligationsMember" xlink:label="ts_SeveralBanksToRefinanceObligationsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TechgenSAMember" xlink:label="ts_TechgenSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TecpetrolInternationalSAMember" xlink:label="ts_TecpetrolInternationalSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TerniumAndUsiminasMember" xlink:label="ts_TerniumAndUsiminasMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TerniumSAMember" xlink:label="ts_TerniumSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TransportationCapacityAgreementPurchasingCapacityOfNaturalGasPerDay" xlink:label="ts_TransportationCapacityAgreementPurchasingCapacityOfNaturalGasPerDay" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UsiminasMember" xlink:label="ts_UsiminasMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_TerniumAndUsiminasMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_UsiminasMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfShareCapitalAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_OrdinarySharesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_PreferenceSharesMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_TechgenSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="ts_TecpetrolInternationalSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BorrowingsByNameAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="ts_SeveralBanksToRefinanceObligationsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember-default" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_TechgenSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DividendsReceivedFromAssociatesClassifiedAsInvestingActivities" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProportionOfVotingPowerHeldInAssociate" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ClosingPricePerADS" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_FairValueOfInvestmentsInAssociatesWherePriceQuotationsPublished" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ClosingPricePerShare" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_TransportationCapacityAgreementPurchasingCapacityOfNaturalGasPerDay" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ProvisionForExposureToTransportationCapacityAgreements" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ProvisionForExposureToPurchaseAndOtherServiceAgreements" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ProvisionForExposureToThePurchaseOfCleanEnergyCertificates" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ProceedsFromRepaymentsOfLoansReceivableFromRelatedParties" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_LoansAndReceivables" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DebtSecurities" xlink:type="arc"/>
    <link:definitionArc order="15" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ProportionOfCorporateGuaranteeCoveringObligations" xlink:type="arc"/>
    <link:definitionArc order="16" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DebtServiceCoverageRatioCoveredPercent" xlink:type="arc"/>
    <link:definitionArc order="17" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_LettersOfCreditCovered" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-20-deferred-income-tax-details-textual" xlink:href="ts-20191231.xsd#statement-note-20-deferred-income-tax-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-20-deferred-income-tax-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:label="country_US" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised" xlink:label="ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxAssetsRelatedToTaxableLossesOfSubsidiaries" xlink:label="ts_DeferredTaxAssetsRelatedToTaxableLossesOfSubsidiaries" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RecognizedTaxLossesExpiringInMoreThanFiveYearsPercentage" xlink:label="ts_RecognizedTaxLossesExpiringInMoreThanFiveYearsPercentage" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RecognizedTaxLossesExpiringInTwoToFiveYearsPercentage" xlink:label="ts_RecognizedTaxLossesExpiringInTwoToFiveYearsPercentage" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RecognizedTaxLossesExpiringWithinOneYearPercentage" xlink:label="ts_RecognizedTaxLossesExpiringWithinOneYearPercentage" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognisedPercentExpiringBetweenTwoAndFiveYears" xlink:label="ts_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognisedPercentExpiringBetweenTwoAndFiveYears" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognisedPercentExpiringInLessThanOneYear" xlink:label="ts_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognisedPercentExpiringInLessThanOneYear" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognisedPercentExpiringInMoreThanFiveYears" xlink:label="ts_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognisedPercentExpiringInMoreThanFiveYears" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_US" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DeferredTaxAssetsRelatedToTaxableLossesOfSubsidiaries" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_RecognizedTaxLossesExpiringWithinOneYearPercentage" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_RecognizedTaxLossesExpiringInTwoToFiveYearsPercentage" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_RecognizedTaxLossesExpiringInMoreThanFiveYearsPercentage" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognisedPercentExpiringInLessThanOneYear" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognisedPercentExpiringBetweenTwoAndFiveYears" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognisedPercentExpiringInMoreThanFiveYears" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-details-textual" xlink:href="ts-20191231.xsd#statement-note-21-other-liabilities-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionOfDiscountRatesMember" xlink:label="ifrs-full_ActuarialAssumptionOfDiscountRatesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember" xlink:label="ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsAxis" xlink:label="ifrs-full_ActuarialAssumptionsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsMember" xlink:label="ifrs-full_ActuarialAssumptionsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsMember" xlink:label="ifrs-full_ActuarialAssumptionsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis" xlink:label="ifrs-full_DefinedBenefitPlansAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EstimateOfContributionsExpectedToBePaidToPlan" xlink:label="ifrs-full_EstimateOfContributionsExpectedToBePaidToPlan" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption" xlink:label="ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption" xlink:label="ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PercentageOfReasonablyPossibleIncreaseInActuarialAssumption" xlink:label="ifrs-full_PercentageOfReasonablyPossibleIncreaseInActuarialAssumption" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FundedPostemploymentBenefitsMember" xlink:label="ts_FundedPostemploymentBenefitsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OverfundedPlan" xlink:label="ts_OverfundedPlan" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UnfundedPostemploymentBenefitsMember" xlink:label="ts_UnfundedPostemploymentBenefitsMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ActuarialAssumptionsAxis" xlink:to="ifrs-full_ActuarialAssumptionsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_DefinedBenefitPlansAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_UnfundedPostemploymentBenefitsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ActuarialAssumptionsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ActuarialAssumptionsMember" xlink:to="ifrs-full_ActuarialAssumptionOfDiscountRatesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ActuarialAssumptionsAxis" xlink:to="ifrs-full_ActuarialAssumptionsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ActuarialAssumptionsMember" xlink:to="ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_FundedPostemploymentBenefitsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PercentageOfReasonablyPossibleIncreaseInActuarialAssumption" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OverfundedPlan" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_EstimateOfContributionsExpectedToBePaidToPlan" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-actuarial-assumptions-details" xlink:href="ts-20191231.xsd#statement-note-21-other-liabilities-actuarial-assumptions-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-actuarial-assumptions-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionOfDiscountRates" xlink:label="ifrs-full_ActuarialAssumptionOfDiscountRates" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases" xlink:label="ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis" xlink:label="ifrs-full_DefinedBenefitPlansAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FundedPostemploymentBenefitsMember" xlink:label="ts_FundedPostemploymentBenefitsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UnfundedPostemploymentBenefitsMember" xlink:label="ts_UnfundedPostemploymentBenefitsMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_RangeAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_BottomOfRangeMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_DefinedBenefitPlansAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_UnfundedPostemploymentBenefitsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_TopOfRangeMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_FundedPostemploymentBenefitsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ActuarialAssumptionOfDiscountRates" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-24-derivative-financial-instruments-details-textual" xlink:href="ts-20191231.xsd#statement-note-24-derivative-financial-instruments-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-24-derivative-financial-instruments-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentDerivativeFinancialAssets" xlink:label="ifrs-full_NoncurrentDerivativeFinancialAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentDerivativeFinancialAssets" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-25-contingencies-commitments-and-restrictions-on-the-distribution-of-profits-details-textual" xlink:href="ts-20191231.xsd#statement-note-25-contingencies-commitments-and-restrictions-on-the-distribution-of-profits-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-25-contingencies-commitments-and-restrictions-on-the-distribution-of-profits-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_BR" xlink:label="country_BR" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_IT" xlink:label="country_IT" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContingentLiabilitiesMember" xlink:label="ifrs-full_ContingentLiabilitiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContingentLiabilitiesMember" xlink:label="ifrs-full_ContingentLiabilitiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:label="ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LegalProceedingsContingentLiabilityMember" xlink:label="ifrs-full_LegalProceedingsContingentLiabilityMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:label="ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:label="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TaxContingentLiabilityMember" xlink:label="ifrs-full_TaxContingentLiabilityMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="srt_CounterpartyNameAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AirLiquideMexicoSDeRLDeCVMember" xlink:label="ts_AirLiquideMexicoSDeRLDeCVMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CanadianNationalRailwayMember" xlink:label="ts_CanadianNationalRailwayMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ChubbMember" xlink:label="ts_ChubbMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CompanhiaSiderrgicaNacionalMember" xlink:label="ts_CompanhiaSiderrgicaNacionalMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:label="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConfabMember" xlink:label="ts_ConfabMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DalmineSPAMember" xlink:label="ts_DalmineSPAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FineImposedPercentageOfAllegedlyUndueCredits" xlink:label="ts_FineImposedPercentageOfAllegedlyUndueCredits" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_GraftechMember" xlink:label="ts_GraftechMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MaximumNumberOfTonsOfPelletsSuppliedAnnually" xlink:label="ts_MaximumNumberOfTonsOfPelletsSuppliedAnnually" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NucorSteelMemphisIncMember" xlink:label="ts_NucorSteelMemphisIncMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PaymentsForSettlement" xlink:label="ts_PaymentsForSettlement" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PercentOfAnnualIronOreNeedsSupplied" xlink:label="ts_PercentOfAnnualIronOreNeedsSupplied" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PerformanceGuaranteesIssued" xlink:label="ts_PerformanceGuaranteesIssued" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PraxairSAMember" xlink:label="ts_PraxairSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ProportionOfCorporateGuaranteeCoveringObligations" xlink:label="ts_ProportionOfCorporateGuaranteeCoveringObligations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PurchaseCommitments" xlink:label="ts_PurchaseCommitments" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SettlementAmountOrderedToPay" xlink:label="ts_SettlementAmountOrderedToPay" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SettlementAmountOrderedToPayDamages" xlink:label="ts_SettlementAmountOrderedToPayDamages" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SettlementAmountOrderedToPayInsuranceDeductible" xlink:label="ts_SettlementAmountOrderedToPayInsuranceDeductible" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TagalongTenderOfferToNoncontrollingInterests" xlink:label="ts_TagalongTenderOfferToNoncontrollingInterests" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TagalongTenderOfferToNoncontrollingInterestsContingentLiability" xlink:label="ts_TagalongTenderOfferToNoncontrollingInterestsContingentLiability" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TagalongTenderOfferToNoncontrollingInterestsPercentage" xlink:label="ts_TagalongTenderOfferToNoncontrollingInterestsPercentage" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TagalongTenderOfferToNoncontrollingInterestsShares" xlink:label="ts_TagalongTenderOfferToNoncontrollingInterestsShares" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxContingentLiabilityRelatedToFiscalYear2014InterestAndPenaltiesMember" xlink:label="ts_TaxContingentLiabilityRelatedToFiscalYear2014InterestAndPenaltiesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxContingentLiabilityRelatedToFiscalYear2014Member" xlink:label="ts_TaxContingentLiabilityRelatedToFiscalYear2014Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxContingentLiabilityRelatedToFiscalYear2014PrincipalMember" xlink:label="ts_TaxContingentLiabilityRelatedToFiscalYear2014PrincipalMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxContingentLiabilityRelatedToFiscalYear2015InterestAndPenaltiesMember" xlink:label="ts_TaxContingentLiabilityRelatedToFiscalYear2015InterestAndPenaltiesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxContingentLiabilityRelatedToFiscalYear2015Member" xlink:label="ts_TaxContingentLiabilityRelatedToFiscalYear2015Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxContingentLiabilityRelatedToFiscalYear2015PrincipalMember" xlink:label="ts_TaxContingentLiabilityRelatedToFiscalYear2015PrincipalMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TechgenSAMember" xlink:label="ts_TechgenSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TermOfSupplyContract" xlink:label="ts_TermOfSupplyContract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TerniumSAMember" xlink:label="ts_TerniumSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TransportadoraDeGasDelNorteSaMember" xlink:label="ts_TransportadoraDeGasDelNorteSaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TribunalDeContasDaUniaoMember" xlink:label="ts_TribunalDeContasDaUniaoMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ValeInternationalSAMember" xlink:label="ts_ValeInternationalSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_VeracelCeluloseSaMember" xlink:label="ts_VeracelCeluloseSaMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:to="ifrs-full_ContingentLiabilitiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CounterpartiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_CompanhiaSiderrgicaNacionalMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ifrs-full_LegalProceedingsContingentLiabilityMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:to="ifrs-full_ContingentLiabilitiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_ConfabMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="srt_CounterpartyNameAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="ts_ChubbMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="ts_VeracelCeluloseSaMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_TribunalDeContasDaUniaoMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ifrs-full_TaxContingentLiabilityMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_BR" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ts_TaxContingentLiabilityRelatedToFiscalYear2014Member" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_DalmineSPAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_IT" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ts_TaxContingentLiabilityRelatedToFiscalYear2014PrincipalMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ts_TaxContingentLiabilityRelatedToFiscalYear2014InterestAndPenaltiesMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ts_TaxContingentLiabilityRelatedToFiscalYear2015Member" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ts_TaxContingentLiabilityRelatedToFiscalYear2015PrincipalMember" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="ts_TaxContingentLiabilityRelatedToFiscalYear2015InterestAndPenaltiesMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_TransportadoraDeGasDelNorteSaMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_PraxairSAMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_GraftechMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_TechgenSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_ValeInternationalSAMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_CanadianNationalRailwayMember" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_AirLiquideMexicoSDeRLDeCVMember" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_NucorSteelMemphisIncMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_TagalongTenderOfferToNoncontrollingInterestsPercentage" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_TagalongTenderOfferToNoncontrollingInterests" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_TagalongTenderOfferToNoncontrollingInterestsShares" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_TagalongTenderOfferToNoncontrollingInterestsContingentLiability" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_PaymentsForSettlement" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SettlementAmountOrderedToPay" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SettlementAmountOrderedToPayInsuranceDeductible" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SettlementAmountOrderedToPayDamages" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_FineImposedPercentageOfAllegedlyUndueCredits" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_TermOfSupplyContract" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_PurchaseCommitments" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ProportionOfCorporateGuaranteeCoveringObligations" xlink:type="arc"/>
    <link:definitionArc order="15" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_PercentOfAnnualIronOreNeedsSupplied" xlink:type="arc"/>
    <link:definitionArc order="16" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_MaximumNumberOfTonsOfPelletsSuppliedAnnually" xlink:type="arc"/>
    <link:definitionArc order="17" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_PerformanceGuaranteesIssued" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-26-agreement-to-build-a-welded-pipe-plant-in-west-siberia-details-textual" xlink:href="ts-20191231.xsd#statement-note-26-agreement-to-build-a-welded-pipe-plant-in-west-siberia-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-26-agreement-to-build-a-welded-pipe-plant-in-west-siberia-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InvestmentsInJointVentures" xlink:label="ifrs-full_InvestmentsInJointVentures" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_JointVenturesAxis" xlink:label="ifrs-full_JointVenturesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities" xlink:label="ifrs-full_OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:label="ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ManufacturingCapacitySteelPipes" xlink:label="ts_ManufacturingCapacitySteelPipes" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PAOPSeverstalMember" xlink:label="ts_PAOPSeverstalMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_WeldedPipePlantInWestSiberiaMember" xlink:label="ts_WeldedPipePlantInWestSiberiaMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_JointVenturesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="ts_WeldedPipePlantInWestSiberiaMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ts_PAOPSeverstalMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_InvestmentsInJointVentures" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ManufacturingCapacitySteelPipes" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-27-business-combinations-details-textual" xlink:href="ts-20191231.xsd#statement-note-27-business-combinations-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-27-business-combinations-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred" xlink:label="ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashTransferred" xlink:label="ifrs-full_CashTransferred" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GoodwillRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_GoodwillRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:label="ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RevenueOfAcquiree" xlink:label="ifrs-full_RevenueOfAcquiree" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_GarrettMember" xlink:label="ts_GarrettMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ManufacturingCapacitySteelPipes" xlink:label="ts_ManufacturingCapacitySteelPipes" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SaudiSteelPipeCompanyMember" xlink:label="ts_SaudiSteelPipeCompanyMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TotalAssetsAndLiabilitiesAcquired" xlink:label="ts_TotalAssetsAndLiabilitiesAcquired" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_SaudiSteelPipeCompanyMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_GarrettMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashTransferred" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ManufacturingCapacitySteelPipes" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_TotalAssetsAndLiabilitiesAcquired" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_GoodwillRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_RevenueOfAcquiree" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-29-discontinued-operations-details-textual" xlink:href="ts-20191231.xsd#statement-note-29-discontinued-operations-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-29-discontinued-operations-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation" xlink:label="ifrs-full_GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:label="ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-30-related-party-transactions-details-textual" xlink:href="ts-20191231.xsd#statement-note-30-related-party-transactions-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-30-related-party-transactions-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:label="ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:label="ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_KeyManagementPersonnelOfEntityOrParentMember" xlink:label="ifrs-full_KeyManagementPersonnelOfEntityOrParentMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesIssued" xlink:label="ifrs-full_NumberOfSharesIssued" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:label="ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SanFaustinSaMember" xlink:label="ts_SanFaustinSaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UnitsIssuedRelatedPartyTransactions" xlink:label="ts_UnitsIssuedRelatedPartyTransactions" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="ts_SanFaustinSaMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="ifrs-full_KeyManagementPersonnelOfEntityOrParentMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NumberOfSharesIssued" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_UnitsIssuedRelatedPartyTransactions" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-32-principal-subsidiaries-details-textual" xlink:href="ts-20191231.xsd#statement-note-32-principal-subsidiaries-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-32-principal-subsidiaries-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:label="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AmajaTubularServicesLimitedMember" xlink:label="ts_AmajaTubularServicesLimitedMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_HydrilCompanyAndSubsidiariesMember" xlink:label="ts_HydrilCompanyAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TechnicalDrillingProductionServicesNigeriaLtdMember" xlink:label="ts_TechnicalDrillingProductionServicesNigeriaLtdMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisSupplyChainSAMember" xlink:label="ts_TenarisSupplyChainSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TubularServicesAngolaLdaMember" xlink:label="ts_TubularServicesAngolaLdaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TubularTechnicalServicesAndPipeCoatersMember" xlink:label="ts_TubularTechnicalServicesAndPipeCoatersMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_HydrilCompanyAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TechnicalDrillingProductionServicesNigeriaLtdMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisSupplyChainSAMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TubularTechnicalServicesAndPipeCoatersMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_AmajaTubularServicesLimitedMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TubularServicesAngolaLdaMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-33-nationalization-of-venezuelan-subsidiaries-details-textual" xlink:href="ts-20191231.xsd#statement-note-33-nationalization-of-venezuelan-subsidiaries-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-33-nationalization-of-venezuelan-subsidiaries-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_VE" xlink:label="country_VE" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestReceivable" xlink:label="ifrs-full_InterestReceivable" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentReceivables" xlink:label="ifrs-full_NoncurrentReceivables" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MatesiMaterialesSiderrgicosSaMember" xlink:label="ts_MatesiMaterialesSiderrgicosSaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NationalizationOfSubsidiariesBasisSpreadOnVariableRate" xlink:label="ts_NationalizationOfSubsidiariesBasisSpreadOnVariableRate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NationalizationOfSubsidiariesCompensationAwardIncludingPreawardInterest" xlink:label="ts_NationalizationOfSubsidiariesCompensationAwardIncludingPreawardInterest" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NationalizationOfSubsidiariesCompensationAwardNotIncludingPreawardInterest" xlink:label="ts_NationalizationOfSubsidiariesCompensationAwardNotIncludingPreawardInterest" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NationalizationOfSubsidiariesCompensationAwardPostawardInterest" xlink:label="ts_NationalizationOfSubsidiariesCompensationAwardPostawardInterest" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NationalizationOfSubsidiariesPostawardInterestRate" xlink:label="ts_NationalizationOfSubsidiariesPostawardInterestRate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NationalizationOfSubsidiariesPreawardInterest" xlink:label="ts_NationalizationOfSubsidiariesPreawardInterest" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NationalizationOfSubsidiariesReimbursementOfLegalFees" xlink:label="ts_NationalizationOfSubsidiariesReimbursementOfLegalFees" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TavsaAndComsiguaMember" xlink:label="ts_TavsaAndComsiguaMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_MatesiMaterialesSiderrgicosSaMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CounterpartiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="country_VE" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TavsaAndComsiguaMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NationalizationOfSubsidiariesCompensationAwardNotIncludingPreawardInterest" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NationalizationOfSubsidiariesPreawardInterest" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NationalizationOfSubsidiariesCompensationAwardIncludingPreawardInterest" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NationalizationOfSubsidiariesPostawardInterestRate" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NationalizationOfSubsidiariesCompensationAwardPostawardInterest" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NationalizationOfSubsidiariesReimbursementOfLegalFees" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NationalizationOfSubsidiariesBasisSpreadOnVariableRate" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_InterestReceivable" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentReceivables" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-35-subsequent-events-details-textual" xlink:href="ts-20191231.xsd#statement-note-35-subsequent-events-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-35-subsequent-events-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashTransferred" xlink:label="ifrs-full_CashTransferred" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MajorBusinessCombinationMember" xlink:label="ifrs-full_MajorBusinessCombinationMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:label="ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AcquisitionOfIPSCOMember" xlink:label="ts_AcquisitionOfIPSCOMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MasterDistributionAgreementTerm" xlink:label="ts_MasterDistributionAgreementTerm" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MasterDistributionAgreementTermAvailableExtension" xlink:label="ts_MasterDistributionAgreementTermAvailableExtension" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_AcquisitionOfIPSCOMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ifrs-full_MajorBusinessCombinationMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashTransferred" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_MasterDistributionAgreementTerm" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_MasterDistributionAgreementTermAvailableExtension" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-36-update-as-of-april-29-2020-details-textual" xlink:href="ts-20191231.xsd#statement-note-36-update-as-of-april-29-2020-details-textual" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-36-update-as-of-april-29-2020-details-textual" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Cash" xlink:label="ifrs-full_Cash" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashTransferred" xlink:label="ifrs-full_CashTransferred" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsPaid" xlink:label="ifrs-full_DividendsPaid" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeneralAndAdministrativeExpense" xlink:label="ifrs-full_GeneralAndAdministrativeExpense" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GoodwillRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_GoodwillRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ImpairmentLoss" xlink:label="ifrs-full_ImpairmentLoss" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MajorBusinessCombinationMember" xlink:label="ifrs-full_MajorBusinessCombinationMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:label="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AcquisitionOfIPSCOMember" xlink:label="ts_AcquisitionOfIPSCOMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EstimatedAnnualSavingsFromTheReductionOfFixedCosts" xlink:label="ts_EstimatedAnnualSavingsFromTheReductionOfFixedCosts" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_GlobalPandemicMember" xlink:label="ts_GlobalPandemicMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ImpairmentOfAssetsMember" xlink:label="ts_ImpairmentOfAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_JfeMember" xlink:label="ts_JfeMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NetCashPositionMember" xlink:label="ts_NetCashPositionMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NkktubesMember" xlink:label="ts_NkktubesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ReductionOfCapitalExpendituresAndResearchAndDevelopmentExpenses" xlink:label="ts_ReductionOfCapitalExpendituresAndResearchAndDevelopmentExpenses" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ts_GlobalPandemicMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ts_NetCashPositionMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ifrs-full_MajorBusinessCombinationMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_AcquisitionOfIPSCOMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ts_ImpairmentOfAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_NkktubesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CounterpartiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="ts_JfeMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EstimatedAnnualSavingsFromTheReductionOfFixedCosts" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ReductionOfCapitalExpendituresAndResearchAndDevelopmentExpenses" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DividendsPaid" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Cash" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashTransferred" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_GoodwillRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_GeneralAndAdministrativeExpense" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ImpairmentLoss" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-accounting-policies-changes-in-key-assumptions-that-would-cause-the-recoverable-amount-to-equal-the-carrying-value-details" xlink:href="ts-20191231.xsd#statement-accounting-policies-changes-in-key-assumptions-that-would-cause-the-recoverable-amount-to-equal-the-carrying-value-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-accounting-policies-changes-in-key-assumptions-that-would-cause-the-recoverable-amount-to-equal-the-carrying-value-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DiscountRateMeasurementInputMember" xlink:label="ifrs-full_DiscountRateMeasurementInputMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_UnobservableInputsAxis" xlink:label="ifrs-full_UnobservableInputsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_UnobservableInputsMember" xlink:label="ifrs-full_UnobservableInputsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_UnobservableInputsMember" xlink:label="ifrs-full_UnobservableInputsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AmountByWhichValueAssignedToKeyAssumptionMustChangeInOrderForUnitsRecoverableAmountToBeEqualToCarryingAmountPercentage" xlink:label="ts_AmountByWhichValueAssignedToKeyAssumptionMustChangeInOrderForUnitsRecoverableAmountToBeEqualToCarryingAmountPercentage" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_GrowthRateMeasurementInputMember" xlink:label="ts_GrowthRateMeasurementInputMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ProjectedChangeRateInFutureCashFlowsMeasurementInputMember" xlink:label="ts_ProjectedChangeRateInFutureCashFlowsMeasurementInputMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_UnobservableInputsAxis" xlink:to="ifrs-full_UnobservableInputsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_UnobservableInputsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_UnobservableInputsMember" xlink:to="ifrs-full_DiscountRateMeasurementInputMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_UnobservableInputsAxis" xlink:to="ifrs-full_UnobservableInputsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_UnobservableInputsMember" xlink:to="ts_GrowthRateMeasurementInputMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_UnobservableInputsMember" xlink:to="ts_ProjectedChangeRateInFutureCashFlowsMeasurementInputMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_AmountByWhichValueAssignedToKeyAssumptionMustChangeInOrderForUnitsRecoverableAmountToBeEqualToCarryingAmountPercentage" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-29-discontinued-operations-components-gain-on-sale-after-income-tax-for-disposals-details" xlink:href="ts-20191231.xsd#statement-note-29-discontinued-operations-components-gain-on-sale-after-income-tax-for-disposals-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-29-discontinued-operations-components-gain-on-sale-after-income-tax-for-disposals-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation" xlink:label="ifrs-full_GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TaxExpenseRelatingToGainLossOnDiscontinuance" xlink:label="ifrs-full_TaxExpenseRelatingToGainLossOnDiscontinuance" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_GrossGainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation" xlink:label="ts_GrossGainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_GrossProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:label="ts_GrossProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NetAssetsSoldInDisposalCarryingAmount" xlink:label="ts_NetAssetsSoldInDisposalCarryingAmount" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TransactionAndOtherCostsRelatedToDisposalsOfDiscontinuedOperations" xlink:label="ts_TransactionAndOtherCostsRelatedToDisposalsOfDiscontinuedOperations" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_GrossProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_TransactionAndOtherCostsRelatedToDisposalsOfDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NetAssetsSoldInDisposalCarryingAmount" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_GrossGainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_TaxExpenseRelatingToGainLossOnDiscontinuance" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-11-rightofuse-assets-net-and-lease-liabilities-evolution-of-rightofuse-assets-details" xlink:href="ts-20191231.xsd#statement-note-11-rightofuse-assets-net-and-lease-liabilities-evolution-of-rightofuse-assets-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-11-rightofuse-assets-net-and-lease-liabilities-evolution-of-rightofuse-assets-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DepreciationRightofuseAssets" xlink:label="ifrs-full_DepreciationRightofuseAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RightofuseAssets" xlink:label="ifrs-full_RightofuseAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_IndustrialBuildingsPlantAndProductionEquipmentMember" xlink:label="ts_IndustrialBuildingsPlantAndProductionEquipmentMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LandAndCivilBuildingsMember" xlink:label="ts_LandAndCivilBuildingsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsAccumulatedDepreciation" xlink:label="ts_RightofuseAssetsAccumulatedDepreciation" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsAccumulatedDepreciationDisposalsConsumptions" xlink:label="ts_RightofuseAssetsAccumulatedDepreciationDisposalsConsumptions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsAccumulatedDepreciationTransfersReclassifications" xlink:label="ts_RightofuseAssetsAccumulatedDepreciationTransfersReclassifications" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsAccumulatedDepreciationTranslationDifferences" xlink:label="ts_RightofuseAssetsAccumulatedDepreciationTranslationDifferences" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsCost" xlink:label="ts_RightofuseAssetsCost" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsCostAbstract" xlink:label="ts_RightofuseAssetsCostAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsCostAdditions" xlink:label="ts_RightofuseAssetsCostAdditions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsCostCurrencyTranslationAdjustments" xlink:label="ts_RightofuseAssetsCostCurrencyTranslationAdjustments" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsCostDisposals" xlink:label="ts_RightofuseAssetsCostDisposals" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsCostIncreaseDueToBusinessCombinations" xlink:label="ts_RightofuseAssetsCostIncreaseDueToBusinessCombinations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsCostTransfers" xlink:label="ts_RightofuseAssetsCostTransfers" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RightofuseAssetsDepreciationAbstract" xlink:label="ts_RightofuseAssetsDepreciationAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_VehiclesFurnitureAndFixturesMember" xlink:label="ts_VehiclesFurnitureAndFixturesMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_LandAndCivilBuildingsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_IndustrialBuildingsPlantAndProductionEquipmentMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_VehiclesFurnitureAndFixturesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_RightofuseAssetsCostAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_RightofuseAssetsCostAbstract" xlink:to="ts_RightofuseAssetsCost" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_RightofuseAssetsCostAbstract" xlink:to="ts_RightofuseAssetsCostIncreaseDueToBusinessCombinations" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_RightofuseAssetsCostAbstract" xlink:to="ts_RightofuseAssetsCostCurrencyTranslationAdjustments" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_RightofuseAssetsCostAbstract" xlink:to="ts_RightofuseAssetsCostAdditions" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_RightofuseAssetsCostAbstract" xlink:to="ts_RightofuseAssetsCostDisposals" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_RightofuseAssetsCostAbstract" xlink:to="ts_RightofuseAssetsCostTransfers" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_RightofuseAssetsDepreciationAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_RightofuseAssetsDepreciationAbstract" xlink:to="ts_RightofuseAssetsAccumulatedDepreciation" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_RightofuseAssetsDepreciationAbstract" xlink:to="ts_RightofuseAssetsAccumulatedDepreciationTranslationDifferences" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_RightofuseAssetsDepreciationAbstract" xlink:to="ifrs-full_DepreciationRightofuseAssets" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_RightofuseAssetsDepreciationAbstract" xlink:to="ts_RightofuseAssetsAccumulatedDepreciationTransfersReclassifications" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_RightofuseAssetsDepreciationAbstract" xlink:to="ts_RightofuseAssetsAccumulatedDepreciationDisposalsConsumptions" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_RightofuseAssetsDepreciationAbstract" xlink:to="ifrs-full_RightofuseAssets" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-accounting-policies-estimated-useful-lives-of-property-plant-and-equipment-details" xlink:href="ts-20191231.xsd#statement-accounting-policies-estimated-useful-lives-of-property-plant-and-equipment-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-accounting-policies-estimated-useful-lives-of-property-plant-and-equipment-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_BuildingsAndImprovementsMember" xlink:label="ts_BuildingsAndImprovementsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PlantAndProductionEquipmentMember" xlink:label="ts_PlantAndProductionEquipmentMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UsefulLivesPropertyPlantAndEquipment" xlink:label="ts_UsefulLivesPropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_VehiclesFurnitureAndFixturesAndOtherEquipmentMember" xlink:label="ts_VehiclesFurnitureAndFixturesAndOtherEquipmentMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ts_BuildingsAndImprovementsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_RangeAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_BottomOfRangeMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_TopOfRangeMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ts_PlantAndProductionEquipmentMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ts_VehiclesFurnitureAndFixturesAndOtherEquipmentMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_UsefulLivesPropertyPlantAndEquipment" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-1-segment-information-reportable-operating-segments-details" xlink:href="ts-20191231.xsd#statement-note-1-segment-information-reportable-operating-segments-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-1-segment-information-reportable-operating-segments-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AllOtherSegmentsMember" xlink:label="ifrs-full_AllOtherSegmentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:label="ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContinuingOperationsMember" xlink:label="ifrs-full_ContinuingOperationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContinuingOperationsMember" xlink:label="ifrs-full_ContinuingOperationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DepreciationAndAmortisationExpense" xlink:label="ifrs-full_DepreciationAndAmortisationExpense" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DiscontinuedOperationsMember" xlink:label="ifrs-full_DiscontinuedOperationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinanceIncomeCost" xlink:label="ifrs-full_FinanceIncomeCost" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="ifrs-full_ProfitLossBeforeTax" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossFromOperatingActivities" xlink:label="ifrs-full_ProfitLossFromOperatingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ReportableSegmentsMember" xlink:label="ifrs-full_ReportableSegmentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsAxis" xlink:label="ifrs-full_SegmentsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:label="ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LossIncomeBeforeEquityInEarningsOfNonconsolidatedCompaniesAndIncomeTax" xlink:label="ts_LossIncomeBeforeEquityInEarningsOfNonconsolidatedCompaniesAndIncomeTax" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ManagementViewDifferencesInCostOfSales" xlink:label="ts_ManagementViewDifferencesInCostOfSales" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ManagementViewDifferencesInDepreciationAndAmortization" xlink:label="ts_ManagementViewDifferencesInDepreciationAndAmortization" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ManagementViewDifferencesInOtherOperatingIncomeExpensesNet" xlink:label="ts_ManagementViewDifferencesInOtherOperatingIncomeExpensesNet" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ManagementViewDifferencesInSellingGeneralAndAdiministrativeExpenses" xlink:label="ts_ManagementViewDifferencesInSellingGeneralAndAdiministrativeExpenses" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ManagementViewOperatingIncome" xlink:label="ts_ManagementViewOperatingIncome" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TubesMember" xlink:label="ts_TubesMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:to="ifrs-full_ContinuingOperationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SegmentsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="ts_TubesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="ifrs-full_AllOtherSegmentsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="ifrs-full_ReportableSegmentsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContinuingOperationsMember" xlink:to="ifrs-full_DiscontinuedOperationsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:to="ifrs-full_ContinuingOperationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Revenue" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ManagementViewOperatingIncome" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ManagementViewDifferencesInCostOfSales" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ManagementViewDifferencesInDepreciationAndAmortization" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ManagementViewDifferencesInSellingGeneralAndAdiministrativeExpenses" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ManagementViewDifferencesInOtherOperatingIncomeExpensesNet" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProfitLossFromOperatingActivities" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_FinanceIncomeCost" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_LossIncomeBeforeEquityInEarningsOfNonconsolidatedCompaniesAndIncomeTax" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProfitLossBeforeTax" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DepreciationAndAmortisationExpense" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-1-segment-information-tubes-segment-revenues-by-market-details" xlink:href="ts-20191231.xsd#statement-note-1-segment-information-tubes-segment-revenues-by-market-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-1-segment-information-tubes-segment-revenues-by-market-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesAxis" xlink:label="ifrs-full_ProductsAndServicesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsAxis" xlink:label="ifrs-full_SegmentsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_HydrocarbonProcessingAndPowerGenerationMember" xlink:label="ts_HydrocarbonProcessingAndPowerGenerationMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_IndustrialAndOtherMember" xlink:label="ts_IndustrialAndOtherMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OilAndGasMember" xlink:label="ts_OilAndGasMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TubesMember" xlink:label="ts_TubesMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SegmentsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="ts_TubesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ProductsAndServicesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="ts_OilAndGasMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="ts_HydrocarbonProcessingAndPowerGenerationMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="ts_IndustrialAndOtherMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Revenue" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-4-labor-costs-labor-costs-included-in-cost-of-sales-and-in-selling-general-and-administrative-expenses-number-of-employees-details" xlink:href="ts-20191231.xsd#statement-note-4-labor-costs-labor-costs-included-in-cost-of-sales-and-in-selling-general-and-administrative-expenses-number-of-employees-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-4-labor-costs-labor-costs-included-in-cost-of-sales-and-in-selling-general-and-administrative-expenses-number-of-employees-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_AR" xlink:label="country_AR" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_BR" xlink:label="country_BR" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_CA" xlink:label="country_CA" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_CO" xlink:label="country_CO" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_ID" xlink:label="country_ID" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_IT" xlink:label="country_IT" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_JP" xlink:label="country_JP" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_MX" xlink:label="country_MX" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_RO" xlink:label="country_RO" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:label="country_US" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfEmployees" xlink:label="ifrs-full_NumberOfEmployees" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherGeographicalAreasMember" xlink:label="ts_OtherGeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_AR" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_MX" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_US" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_IT" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_RO" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_BR" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_CO" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_CA" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_ID" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_JP" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_OtherGeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NumberOfEmployees" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-weighted-average-interest-rates-of-borrowings-details" xlink:href="ts-20191231.xsd#statement-note-19-borrowings-weighted-average-interest-rates-of-borrowings-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-weighted-average-interest-rates-of-borrowings-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsInterestRate" xlink:label="ifrs-full_BorrowingsInterestRate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_WeightedAverageMember" xlink:label="ifrs-full_WeightedAverageMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_RangeAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_WeightedAverageMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_BorrowingsInterestRate" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-20-deferred-income-tax-deferred-tax-assets-and-liabilities-details" xlink:href="ts-20191231.xsd#statement-note-20-deferred-income-tax-deferred-tax-assets-and-liabilities-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-20-deferred-income-tax-deferred-tax-assets-and-liabilities-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfLiabilitiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss" xlink:label="ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxLiabilityAsset" xlink:label="ifrs-full_DeferredTaxLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome" xlink:label="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset" xlink:label="ifrs-full_IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesMember" xlink:label="ifrs-full_LiabilitiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesMember" xlink:label="ifrs-full_LiabilitiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTabLiabilitiesMember" xlink:label="ts_DeferredTabLiabilitiesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxAssetIncreaseDecreaseDueToAdoptionOfNewAccountingStandards" xlink:label="ts_DeferredTaxAssetIncreaseDecreaseDueToAdoptionOfNewAccountingStandards" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxAssetsInventoryMember" xlink:label="ts_DeferredTaxAssetsInventoryMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxAssetsMember" xlink:label="ts_DeferredTaxAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxAssetsOtherMember" xlink:label="ts_DeferredTaxAssetsOtherMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxAssetsProvisionsAndAllowancesMember" xlink:label="ts_DeferredTaxAssetsProvisionsAndAllowancesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxAssetsTaxLossMember" xlink:label="ts_DeferredTaxAssetsTaxLossMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxLiabilitiesFixedAssetsMember" xlink:label="ts_DeferredTaxLiabilitiesFixedAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxLiabilitiesIntangibleAndOtherAssetsMember" xlink:label="ts_DeferredTaxLiabilitiesIntangibleAndOtherAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxLiabilitiesInventoryMember" xlink:label="ts_DeferredTaxLiabilitiesInventoryMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxLiabilityIncreaseDecreaseDueToAdoptionOfNewAccountingStandards" xlink:label="ts_DeferredTaxLiabilityIncreaseDecreaseDueToAdoptionOfNewAccountingStandards" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfLiabilitiesAxis" xlink:to="ifrs-full_LiabilitiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfLiabilitiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="ts_DeferredTaxLiabilitiesFixedAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfLiabilitiesAxis" xlink:to="ifrs-full_LiabilitiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="ts_DeferredTaxLiabilitiesInventoryMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="ts_DeferredTaxLiabilitiesIntangibleAndOtherAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="ts_DeferredTabLiabilitiesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_DeferredTaxAssetsProvisionsAndAllowancesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_DeferredTaxAssetsInventoryMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_DeferredTaxAssetsTaxLossMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_DeferredTaxAssetsOtherMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_DeferredTaxAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DeferredTaxLiabilityIncreaseDecreaseDueToAdoptionOfNewAccountingStandards" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DeferredTaxAssetIncreaseDecreaseDueToAdoptionOfNewAccountingStandards" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-23-current-allowances-and-provisions-liabilities-details" xlink:href="ts-20191231.xsd#statement-note-23-current-allowances-and-provisions-liabilities-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-23-current-allowances-and-provisions-liabilities-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsOtherProvisions" xlink:label="ifrs-full_AcquisitionsThroughBusinessCombinationsOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ifrs-full_ClassesOfProvisionsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions" xlink:label="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MiscellaneousOtherProvisionsMember" xlink:label="ifrs-full_MiscellaneousOtherProvisionsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisions" xlink:label="ifrs-full_OtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProvisionUsedOtherProvisions" xlink:label="ifrs-full_ProvisionUsedOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AdditionalProvisionsOtherProvisionsReversals" xlink:label="ts_AdditionalProvisionsOtherProvisionsReversals" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ProvisionsForCurrentLiabilitiesMember" xlink:label="ts_ProvisionsForCurrentLiabilitiesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SalesRisksMember" xlink:label="ts_SalesRisksMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfProvisionsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="ts_SalesRisksMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="ifrs-full_MiscellaneousOtherProvisionsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="ts_ProvisionsForCurrentLiabilitiesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AcquisitionsThroughBusinessCombinationsOtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_AdditionalProvisionsOtherProvisionsReversals" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProvisionUsedOtherProvisions" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-24-derivative-financial-instruments-hedge-reserve-evolution-details" xlink:href="ts-20191231.xsd#statement-note-24-derivative-financial-instruments-hedge-reserve-evolution-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-24-derivative-financial-instruments-hedge-reserve-evolution-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowHedgesMember" xlink:label="ifrs-full_CashFlowHedgesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainLossOnChangeInFairValueOfHedgedItemUsedAsBasisForRecognisingHedgeIneffectiveness" xlink:label="ifrs-full_GainLossOnChangeInFairValueOfHedgedItemUsedAsBasisForRecognisingHedgeIneffectiveness" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsAxis" xlink:label="ifrs-full_HedgingInstrumentsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsMember" xlink:label="ifrs-full_HedgingInstrumentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsMember" xlink:label="ifrs-full_HedgingInstrumentsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ReserveOfCashFlowHedgesContinuingHedges" xlink:label="ifrs-full_ReserveOfCashFlowHedgesContinuingHedges" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfHedgesAxis" xlink:label="ifrs-full_TypesOfHedgesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfHedgesMember" xlink:label="ifrs-full_TypesOfHedgesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfHedgesMember" xlink:label="ifrs-full_TypesOfHedgesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeDerivativesContractsMember" xlink:label="ts_ForeignExchangeDerivativesContractsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfHedgesAxis" xlink:to="ifrs-full_TypesOfHedgesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_HedgingInstrumentsAxis" xlink:to="ifrs-full_HedgingInstrumentsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_HedgingInstrumentsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeDerivativesContractsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_HedgingInstrumentsAxis" xlink:to="ifrs-full_HedgingInstrumentsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfHedgesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfHedgesMember" xlink:to="ifrs-full_CashFlowHedgesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfHedgesAxis" xlink:to="ifrs-full_TypesOfHedgesMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ReserveOfCashFlowHedgesContinuingHedges" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_GainLossOnChangeInFairValueOfHedgedItemUsedAsBasisForRecognisingHedgeIneffectiveness" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-36-update-as-of-april-29-2020-assets-and-liabilities-assumed-details" xlink:href="ts-20191231.xsd#statement-note-36-update-as-of-april-29-2020-assets-and-liabilities-assumed-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-36-update-as-of-april-29-2020-assets-and-liabilities-assumed-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_BorrowingsRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed" xlink:label="ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MajorBusinessCombinationMember" xlink:label="ifrs-full_MajorBusinessCombinationMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AcquisitionOfIPSCOMember" xlink:label="ts_AcquisitionOfIPSCOMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherAssetsRecognisedAsOfAcquisitionDate" xlink:label="ts_OtherAssetsRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherLiabilitiesRecognisedAsOfAcquisitionDate" xlink:label="ts_OtherLiabilitiesRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ProvisionsRecognisedAsOfAcquisitionDate" xlink:label="ts_ProvisionsRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_WorkingCapitalRecognisedAsOfAcquisitionDate" xlink:label="ts_WorkingCapitalRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_AcquisitionOfIPSCOMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ifrs-full_MajorBusinessCombinationMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_WorkingCapitalRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherAssetsRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_BorrowingsRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ProvisionsRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherLiabilitiesRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement--consolidated-income-statement" xlink:href="ts-20191231.xsd#statement--consolidated-income-statement" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement--consolidated-income-statement" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BasicAndDilutedEarningsLossPerShare" xlink:label="ifrs-full_BasicAndDilutedEarningsLossPerShare" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BasicAndDilutedEarningsLossPerShareFromContinuingOperations" xlink:label="ifrs-full_BasicAndDilutedEarningsLossPerShareFromContinuingOperations" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CostOfSales" xlink:label="ifrs-full_CostOfSales" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EarningsPerShareAbstract" xlink:label="ifrs-full_EarningsPerShareAbstract" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinanceCosts" xlink:label="ifrs-full_FinanceCosts" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinanceIncome" xlink:label="ifrs-full_FinanceIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossProfit" xlink:label="ifrs-full_GrossProfit" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherExpenseByFunction" xlink:label="ifrs-full_OtherExpenseByFunction" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherFinanceIncomeCost" xlink:label="ifrs-full_OtherFinanceIncomeCost" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherIncome" xlink:label="ifrs-full_OtherIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossAttributableToAbstract" xlink:label="ifrs-full_ProfitLossAttributableToAbstract" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:label="ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:label="ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="ifrs-full_ProfitLossBeforeTax" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossFromContinuingOperations" xlink:label="ifrs-full_ProfitLossFromContinuingOperations" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossFromDiscontinuedOperations" xlink:label="ifrs-full_ProfitLossFromDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossFromOperatingActivities" xlink:label="ifrs-full_ProfitLossFromOperatingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:label="ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:label="ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_WeightedAverageShares" xlink:label="ifrs-full_WeightedAverageShares" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_BasicAndDilutedEarningsLossesPerAds" xlink:label="ts_BasicAndDilutedEarningsLossesPerAds" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_BasicAndDilutedEarningsLossesPerAdsFromContinuingOperations" xlink:label="ts_BasicAndDilutedEarningsLossesPerAdsFromContinuingOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ContinuingAndDiscontinuedOperationsAbstract" xlink:label="ts_ContinuingAndDiscontinuedOperationsAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ContinuingOperationsAbstract" xlink:label="ts_ContinuingOperationsAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DiscontinuedOperationsAbstract" xlink:label="ts_DiscontinuedOperationsAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LossIncomeBeforeEquityInEarningsOfNonconsolidatedCompaniesAndIncomeTax" xlink:label="ts_LossIncomeBeforeEquityInEarningsOfNonconsolidatedCompaniesAndIncomeTax" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ContinuingOperationsAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_Revenue" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_CostOfSales" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_GrossProfit" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_OtherIncome" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_OtherExpenseByFunction" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_ProfitLossFromOperatingActivities" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_FinanceIncome" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_FinanceCosts" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_OtherFinanceIncomeCost" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ts_LossIncomeBeforeEquityInEarningsOfNonconsolidatedCompaniesAndIncomeTax" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_ProfitLossBeforeTax" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_ProfitLossFromContinuingOperations" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DiscontinuedOperationsAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DiscontinuedOperationsAbstract" xlink:to="ifrs-full_ProfitLossFromDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_DiscontinuedOperationsAbstract" xlink:to="ifrs-full_ProfitLoss" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProfitLossAttributableToAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProfitLossAttributableToAbstract" xlink:to="ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProfitLossAttributableToAbstract" xlink:to="ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_EarningsPerShareAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EarningsPerShareAbstract" xlink:to="ifrs-full_WeightedAverageShares" xlink:type="arc"/>
    <link:definitionArc order="15" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ifrs-full_BasicAndDilutedEarningsLossPerShareFromContinuingOperations" xlink:type="arc"/>
    <link:definitionArc order="16" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingOperationsAbstract" xlink:to="ts_BasicAndDilutedEarningsLossesPerAdsFromContinuingOperations" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ContinuingAndDiscontinuedOperationsAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingAndDiscontinuedOperationsAbstract" xlink:to="ifrs-full_BasicAndDilutedEarningsLossPerShare" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_ContinuingAndDiscontinuedOperationsAbstract" xlink:to="ts_BasicAndDilutedEarningsLossesPerAds" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-consolidated-statement-of-cash-flows" xlink:href="ts-20191231.xsd#statement-consolidated-statement-of-cash-flows" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-consolidated-statement-of-cash-flows" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense" xlink:label="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:label="ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets" xlink:label="ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdjustmentsForProvisions" xlink:label="ifrs-full_AdjustmentsForProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:label="ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdjustmentsForUndistributedProfitsOfAssociates" xlink:label="ifrs-full_AdjustmentsForUndistributedProfitsOfAssociates" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BankOverdraftsClassifiedAsCashEquivalents" xlink:label="ifrs-full_BankOverdraftsClassifiedAsCashEquivalents" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAdvancesAndLoansMadeToRelatedParties" xlink:label="ifrs-full_CashAdvancesAndLoansMadeToRelatedParties" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:label="ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments" xlink:label="ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:label="ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities" xlink:label="ifrs-full_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToRelatedParties" xlink:label="ifrs-full_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToRelatedParties" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:label="ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities" xlink:label="ifrs-full_DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsReceivedFromAssociatesClassifiedAsInvestingActivities" xlink:label="ifrs-full_DividendsReceivedFromAssociatesClassifiedAsInvestingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents" xlink:label="ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:label="ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRevenueExpense" xlink:label="ifrs-full_InterestRevenueExpense" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherAdjustmentsForNoncashItems" xlink:label="ifrs-full_OtherAdjustmentsForNoncashItems" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:label="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities" xlink:label="ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:label="ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:label="ifrs-full_ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PurchaseOfInterestsInAssociates" xlink:label="ifrs-full_PurchaseOfInterestsInAssociates" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PurchaseOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod" xlink:label="ifrs-full_PurchaseOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:label="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CashAndCashEquivalentsIncludingThePortionOfCashAndCashEquivalentsThatAreClassifiedAsAPartOfADisposalGroup" xlink:label="ts_CashAndCashEquivalentsIncludingThePortionOfCashAndCashEquivalentsThatAreClassifiedAsAPartOfADisposalGroup" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MovementInCashAndCashEquivalentsAbstract" xlink:label="ts_MovementInCashAndCashEquivalentsAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ProceedsPaymentsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:label="ts_ProceedsPaymentsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract" xlink:to="ifrs-full_ProfitLoss" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:to="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:to="ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:to="ifrs-full_AdjustmentsForUndistributedProfitsOfAssociates" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:to="ifrs-full_InterestRevenueExpense" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:to="ifrs-full_AdjustmentsForProvisions" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:to="ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:to="ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:to="ifrs-full_OtherAdjustmentsForNoncashItems" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:to="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="ifrs-full_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="ifrs-full_PurchaseOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="ifrs-full_PurchaseOfInterestsInAssociates" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="ifrs-full_CashAdvancesAndLoansMadeToRelatedParties" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="ifrs-full_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToRelatedParties" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="ifrs-full_ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="ifrs-full_DividendsReceivedFromAssociatesClassifiedAsInvestingActivities" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:to="ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:to="ifrs-full_DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:to="ts_ProceedsPaymentsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:to="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:to="ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:to="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:to="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:to="ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_MovementInCashAndCashEquivalentsAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_MovementInCashAndCashEquivalentsAbstract" xlink:to="ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_MovementInCashAndCashEquivalentsAbstract" xlink:to="ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_MovementInCashAndCashEquivalentsAbstract" xlink:to="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_MovementInCashAndCashEquivalentsAbstract" xlink:to="ts_CashAndCashEquivalentsIncludingThePortionOfCashAndCashEquivalentsThatAreClassifiedAsAPartOfADisposalGroup" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_MovementInCashAndCashEquivalentsAbstract" xlink:to="ifrs-full_BankOverdraftsClassifiedAsCashEquivalents" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-financial-risk-management-financial-instruments-and-classification-within-the-fair-value-hierarchy-details" xlink:href="ts-20191231.xsd#statement-financial-risk-management-financial-instruments-and-classification-within-the-fair-value-hierarchy-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-financial-risk-management-financial-instruments-and-classification-within-the-fair-value-hierarchy-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:label="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:label="ifrs-full_AllLevelsOfFairValueHierarchyMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AssetsAbstract" xlink:label="ifrs-full_AssetsAbstract" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Borrowings" xlink:label="ifrs-full_Borrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:label="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis" xlink:label="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfLiabilitiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentInvestments" xlink:label="ifrs-full_CurrentInvestments" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentTradeReceivables" xlink:label="ifrs-full_CurrentTradeReceivables" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DerivativeFinancialAssets" xlink:label="ifrs-full_DerivativeFinancialAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DerivativeFinancialLiabilities" xlink:label="ifrs-full_DerivativeFinancialLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DerivativesMember" xlink:label="ifrs-full_DerivativesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssets" xlink:label="ifrs-full_FinancialAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:label="ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember" xlink:label="ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:label="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsCategoryMember" xlink:label="ifrs-full_FinancialAssetsCategoryMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsCategoryMember" xlink:label="ifrs-full_FinancialAssetsCategoryMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilities" xlink:label="ifrs-full_FinancialLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LeaseLiabilities" xlink:label="ifrs-full_LeaseLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Level1OfFairValueHierarchyMember" xlink:label="ifrs-full_Level1OfFairValueHierarchyMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Level2OfFairValueHierarchyMember" xlink:label="ifrs-full_Level2OfFairValueHierarchyMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Level3OfFairValueHierarchyMember" xlink:label="ifrs-full_Level3OfFairValueHierarchyMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:label="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesAbstract" xlink:label="ifrs-full_LiabilitiesAbstract" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesMember" xlink:label="ifrs-full_LiabilitiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesMember" xlink:label="ifrs-full_LiabilitiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod" xlink:label="ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherReceivables" xlink:label="ifrs-full_OtherReceivables" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeAndOtherCurrentPayables" xlink:label="ifrs-full_TradeAndOtherCurrentPayables" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_BondsAndOtherFixedIncomeMember" xlink:label="ts_BondsAndOtherFixedIncomeMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CertificatesOfDepositsMember" xlink:label="ts_CertificatesOfDepositsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CommercialPapersMember" xlink:label="ts_CommercialPapersMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CorporatesSecuritiesMember" xlink:label="ts_CorporatesSecuritiesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DerivativeLiabilitiesMember" xlink:label="ts_DerivativeLiabilitiesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FixedIncomeTimedepositZeroCouponBondsCommercialPapersMember" xlink:label="ts_FixedIncomeTimedepositZeroCouponBondsCommercialPapersMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NonUsGovernmentSecuritiesMember" xlink:label="ts_NonUsGovernmentSecuritiesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherInvestments1Member" xlink:label="ts_OtherInvestments1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherNotesMember" xlink:label="ts_OtherNotesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherReceivablesMember" xlink:label="ts_OtherReceivablesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherReceivablesNonfinancialMember" xlink:label="ts_OtherReceivablesNonfinancialMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StructuredNotesMember" xlink:label="ts_StructuredNotesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UsGovernmentSecuritiesMember" xlink:label="ts_UsGovernmentSecuritiesMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsCategoryMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfLiabilitiesAxis" xlink:to="ifrs-full_LiabilitiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:to="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsCategoryMember" xlink:to="ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsCategoryMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsCategoryMember" xlink:to="ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsCategoryMember" xlink:to="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:to="ifrs-full_Level1OfFairValueHierarchyMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:to="ifrs-full_AllLevelsOfFairValueHierarchyMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:to="ifrs-full_Level2OfFairValueHierarchyMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:to="ifrs-full_Level3OfFairValueHierarchyMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_FixedIncomeTimedepositZeroCouponBondsCommercialPapersMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_CertificatesOfDepositsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_CommercialPapersMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_OtherNotesMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_BondsAndOtherFixedIncomeMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_UsGovernmentSecuritiesMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_NonUsGovernmentSecuritiesMember" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_CorporatesSecuritiesMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ifrs-full_DerivativesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember-default" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_StructuredNotesMember" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_OtherInvestments1Member" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_OtherReceivablesMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_OtherReceivablesNonfinancialMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfLiabilitiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="ts_DerivativeLiabilitiesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfLiabilitiesAxis" xlink:to="ifrs-full_LiabilitiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AssetsAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_CashAndCashEquivalents" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_CurrentInvestments" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_DerivativeFinancialAssets" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_CurrentTradeReceivables" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_OtherReceivables" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_FinancialAssets" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_LiabilitiesAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesAbstract" xlink:to="ifrs-full_Borrowings" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesAbstract" xlink:to="ifrs-full_TradeAndOtherCurrentPayables" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesAbstract" xlink:to="ifrs-full_LeaseLiabilities" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesAbstract" xlink:to="ifrs-full_DerivativeFinancialLiabilities" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesAbstract" xlink:to="ifrs-full_FinancialLiabilities" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-18-cash-and-cash-equivalents-and-other-investments-components-of-cash-and-cash-equivalents-and-other-investments-details" xlink:href="ts-20191231.xsd#statement-note-18-cash-and-cash-equivalents-and-other-investments-components-of-cash-and-cash-equivalents-and-other-investments-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-18-cash-and-cash-equivalents-and-other-investments-components-of-cash-and-cash-equivalents-and-other-investments-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BalancesWithBanks" xlink:label="ifrs-full_BalancesWithBanks" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalentsAbstract" xlink:label="ifrs-full_CashAndCashEquivalentsAbstract" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis" xlink:label="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentInvestments" xlink:label="ifrs-full_CurrentInvestments" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod" xlink:label="ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShorttermDepositsClassifiedAsCashEquivalents" xlink:label="ifrs-full_ShorttermDepositsClassifiedAsCashEquivalents" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents" xlink:label="ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_BondsAndOtherFixedIncomeMember" xlink:label="ts_BondsAndOtherFixedIncomeMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FixedIncomeTimedepositZeroCouponBondsCommercialPapersMember" xlink:label="ts_FixedIncomeTimedepositZeroCouponBondsCommercialPapersMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherInvestments1Member" xlink:label="ts_OtherInvestments1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherInvestmentsCurrentAbstract" xlink:label="ts_OtherInvestmentsCurrentAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherInvestmentsNoncurrentAbstract" xlink:label="ts_OtherInvestmentsNoncurrentAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_FixedIncomeTimedepositZeroCouponBondsCommercialPapersMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_BondsAndOtherFixedIncomeMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ts_OtherInvestments1Member" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashAndCashEquivalentsAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashAndCashEquivalentsAbstract" xlink:to="ifrs-full_BalancesWithBanks" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashAndCashEquivalentsAbstract" xlink:to="ifrs-full_ShorttermDepositsClassifiedAsCashEquivalents" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashAndCashEquivalentsAbstract" xlink:to="ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CashAndCashEquivalentsAbstract" xlink:to="ifrs-full_CashAndCashEquivalents" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherInvestmentsCurrentAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherInvestmentsCurrentAbstract" xlink:to="ifrs-full_CurrentInvestments" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherInvestmentsNoncurrentAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherInvestmentsNoncurrentAbstract" xlink:to="ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-consolidated-statement-of-comprehensive-income" xlink:href="ts-20191231.xsd#statement-consolidated-statement-of-comprehensive-income" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-consolidated-statement-of-comprehensive-income" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:label="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:label="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:label="ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:label="ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:label="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss" xlink:label="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss" xlink:label="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncome" xlink:label="ifrs-full_OtherComprehensiveIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxCashFlowHedges" xlink:label="ifrs-full_OtherComprehensiveIncomeBeforeTaxCashFlowHedges" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation" xlink:label="ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:label="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:label="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:label="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:label="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ComprehensiveIncomeFromContinuingOperations" xlink:label="ts_ComprehensiveIncomeFromContinuingOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ComprehensiveIncomeFromDiscontinuedOperations" xlink:label="ts_ComprehensiveIncomeFromDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherComprehensiveIncomeBeforeTaxCashFlowHedgesAndOthersAttributableToNonconsolidatedCompanies" xlink:label="ts_OtherComprehensiveIncomeBeforeTaxCashFlowHedgesAndOthersAttributableToNonconsolidatedCompanies" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherComprehensiveIncomeLossBeforeTaxExchangeDifferencesOnTranslationAttributableToNonconsolidatedCompanies" xlink:label="ts_OtherComprehensiveIncomeLossBeforeTaxExchangeDifferencesOnTranslationAttributableToNonconsolidatedCompanies" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TotalComprehensiveIncomeLossForTheYearAttributableToOwnersOfTheParentArisesFromAbstract" xlink:label="ts_TotalComprehensiveIncomeLossForTheYearAttributableToOwnersOfTheParentArisesFromAbstract" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProfitLoss" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="ifrs-full_OtherComprehensiveIncomeBeforeTaxCashFlowHedges" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="ts_OtherComprehensiveIncomeLossBeforeTaxExchangeDifferencesOnTranslationAttributableToNonconsolidatedCompanies" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="ts_OtherComprehensiveIncomeBeforeTaxCashFlowHedgesAndOthersAttributableToNonconsolidatedCompanies" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="ifrs-full_OtherComprehensiveIncome" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="ifrs-full_ComprehensiveIncome" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:to="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:to="ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_TotalComprehensiveIncomeLossForTheYearAttributableToOwnersOfTheParentArisesFromAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_TotalComprehensiveIncomeLossForTheYearAttributableToOwnersOfTheParentArisesFromAbstract" xlink:to="ts_ComprehensiveIncomeFromContinuingOperations" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_TotalComprehensiveIncomeLossForTheYearAttributableToOwnersOfTheParentArisesFromAbstract" xlink:to="ts_ComprehensiveIncomeFromDiscontinuedOperations" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-consolidated-statement-of-changes-in-equity" xlink:href="ts-20191231.xsd#statement-consolidated-statement-of-changes-in-equity" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-consolidated-statement-of-changes-in-equity" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="ifrs-full_ComponentsOfEquityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:label="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityMember" xlink:label="ifrs-full_EquityMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityMember" xlink:label="ifrs-full_EquityMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:label="ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IssuedCapitalMember" xlink:label="ifrs-full_IssuedCapitalMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncontrollingInterestsMember" xlink:label="ifrs-full_NoncontrollingInterestsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncome" xlink:label="ifrs-full_OtherComprehensiveIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherReservesMember" xlink:label="ifrs-full_OtherReservesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PreviouslyStatedMember" xlink:label="ifrs-full_PreviouslyStatedMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RestatedMember" xlink:label="ifrs-full_RestatedMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RestatedMember" xlink:label="ifrs-full_RestatedMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RetainedEarningsMember" xlink:label="ifrs-full_RetainedEarningsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:label="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:label="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharePremiumMember" xlink:label="ifrs-full_SharePremiumMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrencyTranslationAdjustmentMember" xlink:label="ts_CurrencyTranslationAdjustmentMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DividendsPaidIncludingNoncontrollingInterest" xlink:label="ts_DividendsPaidIncludingNoncontrollingInterest" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfChangesInAccountingPolicy" xlink:label="ts_EffectOfChangesInAccountingPolicy" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EquityAdjustedBalance" xlink:label="ts_EquityAdjustedBalance" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LegalReservesMember" xlink:label="ts_LegalReservesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RestatedMember" xlink:to="ifrs-full_PreviouslyStatedMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:to="ifrs-full_RestatedMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ComponentsOfEquityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_IssuedCapitalMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_EquityMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ts_LegalReservesMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_SharePremiumMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ts_CurrencyTranslationAdjustmentMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_OtherReservesMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_RetainedEarningsMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_NoncontrollingInterestsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_EquityMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:to="ifrs-full_RestatedMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Equity" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProfitLoss" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherComprehensiveIncome" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ComprehensiveIncome" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DividendsPaidIncludingNoncontrollingInterest" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfChangesInAccountingPolicy" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EquityAdjustedBalance" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-financial-risk-management-financial-assets-and-liabilities-which-impact-profit-and-loss-details" xlink:href="ts-20191231.xsd#statement-financial-risk-management-financial-assets-and-liabilities-which-impact-profit-and-loss-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-financial-risk-management-financial-assets-and-liabilities-which-impact-profit-and-loss-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="ifrs-full_TypesOfRisksAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ArgentinePesoUsDollarForeignExchangeRiskMember" xlink:label="ts_ArgentinePesoUsDollarForeignExchangeRiskMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EuroUsDollarForeignExchangeRiskMember" xlink:label="ts_EuroUsDollarForeignExchangeRiskMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeRiskCurrencyExposure" xlink:label="ts_ForeignExchangeRiskCurrencyExposure" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SaudiArabianRiyalUsDollarExchangeRiskMember" xlink:label="ts_SaudiArabianRiyalUsDollarExchangeRiskMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfRisksAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_ArgentinePesoUsDollarForeignExchangeRiskMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_EuroUsDollarForeignExchangeRiskMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ts_SaudiArabianRiyalUsDollarExchangeRiskMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ForeignExchangeRiskCurrencyExposure" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-1-segment-information-geographical-information-details" xlink:href="ts-20191231.xsd#statement-note-1-segment-information-geographical-information-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-1-segment-information-geographical-information-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Assets" xlink:label="ifrs-full_Assets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:label="ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContinuingOperationsMember" xlink:label="ifrs-full_ContinuingOperationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContinuingOperationsMember" xlink:label="ifrs-full_ContinuingOperationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentTradeReceivables" xlink:label="ifrs-full_CurrentTradeReceivables" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DepreciationAndAmortisationExpense" xlink:label="ifrs-full_DepreciationAndAmortisationExpense" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DiscontinuedOperationsMember" xlink:label="ifrs-full_DiscontinuedOperationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="ifrs-full_PropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AsiaPacific1Member" xlink:label="ts_AsiaPacific1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ContinuingOperations1Member" xlink:label="ts_ContinuingOperations1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_Europe1Member" xlink:label="ts_Europe1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MiddleEastAndAfricaMember" xlink:label="ts_MiddleEastAndAfricaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NorthAmerica1Member" xlink:label="ts_NorthAmerica1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SouthAmerica1Member" xlink:label="ts_SouthAmerica1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UnallocatedRegionMember" xlink:label="ts_UnallocatedRegionMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:to="ifrs-full_ContinuingOperationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_NorthAmerica1Member" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_SouthAmerica1Member" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_Europe1Member" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_MiddleEastAndAfricaMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_AsiaPacific1Member" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_UnallocatedRegionMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContinuingOperationsMember" xlink:to="ifrs-full_DiscontinuedOperationsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:to="ifrs-full_ContinuingOperationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContinuingOperationsMember" xlink:to="ts_ContinuingOperations1Member" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Revenue" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Assets" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentTradeReceivables" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PropertyPlantAndEquipment" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DepreciationAndAmortisationExpense" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-11-rightofuse-assets-net-and-lease-liabilities-evolution-of-lease-liability-details" xlink:href="ts-20191231.xsd#statement-note-11-rightofuse-assets-net-and-lease-liabilities-evolution-of-lease-liability-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-11-rightofuse-assets-net-and-lease-liabilities-evolution-of-lease-liability-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LeaseLiabilities" xlink:label="ifrs-full_LeaseLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LeaseLiabilitiesAdditions" xlink:label="ts_LeaseLiabilitiesAdditions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LeaseLiabilitiesCancellations" xlink:label="ts_LeaseLiabilitiesCancellations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LeaseLiabilitiesIncreaseDueToBusinessCombinations" xlink:label="ts_LeaseLiabilitiesIncreaseDueToBusinessCombinations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LeaseLiabilitiesInterestAccrued" xlink:label="ts_LeaseLiabilitiesInterestAccrued" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LeaseLiabilitiesRepayments" xlink:label="ts_LeaseLiabilitiesRepayments" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LeaseLiabilitiesTranslationDifferences" xlink:label="ts_LeaseLiabilitiesTranslationDifferences" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_LeaseLiabilities" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_LeaseLiabilitiesIncreaseDueToBusinessCombinations" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_LeaseLiabilitiesTranslationDifferences" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_LeaseLiabilitiesAdditions" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_LeaseLiabilitiesCancellations" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_LeaseLiabilitiesRepayments" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_LeaseLiabilitiesInterestAccrued" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-12-investments-in-nonconsolidated-companies-summary-of-investments-in-nonconsolidated-companies-details" xlink:href="ts-20191231.xsd#statement-note-12-investments-in-nonconsolidated-companies-summary-of-investments-in-nonconsolidated-companies-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-12-investments-in-nonconsolidated-companies-summary-of-investments-in-nonconsolidated-companies-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:label="ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DividendsDeclaredByNonconsolidatedCompanies" xlink:label="ts_DividendsDeclaredByNonconsolidatedCompanies" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_IncomeLossFromEquityMethodInvestmentsInNonconsolidatedCompanies" xlink:label="ts_IncomeLossFromEquityMethodInvestmentsInNonconsolidatedCompanies" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_InvestmentsInSubsidiariesJointVenturesAndAssociatesAdditions" xlink:label="ts_InvestmentsInSubsidiariesJointVenturesAndAssociatesAdditions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_InvestmentsInSubsidiariesJointVenturesAndAssociatesIncreaseDueToBusinessCombinations" xlink:label="ts_InvestmentsInSubsidiariesJointVenturesAndAssociatesIncreaseDueToBusinessCombinations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherComprehensiveIncomeLossBeforeTaxExchangeDifferencesOnTranslationAttributableToNonconsolidatedCompanies" xlink:label="ts_OtherComprehensiveIncomeLossBeforeTaxExchangeDifferencesOnTranslationAttributableToNonconsolidatedCompanies" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodIncludingDividendsDeclaredNetOfTax" xlink:label="ts_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodIncludingDividendsDeclaredNetOfTax" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherComprehensiveIncomeLossBeforeTaxExchangeDifferencesOnTranslationAttributableToNonconsolidatedCompanies" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_IncomeLossFromEquityMethodInvestmentsInNonconsolidatedCompanies" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_InvestmentsInSubsidiariesJointVenturesAndAssociatesIncreaseDueToBusinessCombinations" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DividendsDeclaredByNonconsolidatedCompanies" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_InvestmentsInSubsidiariesJointVenturesAndAssociatesAdditions" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodIncludingDividendsDeclaredNetOfTax" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-12-investments-in-nonconsolidated-companies-summary-of-selected-financial-information-details" xlink:href="ts-20191231.xsd#statement-note-12-investments-in-nonconsolidated-companies-summary-of-selected-financial-information-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-12-investments-in-nonconsolidated-companies-summary-of-selected-financial-information-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Assets" xlink:label="ifrs-full_Assets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:label="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentAssets" xlink:label="ifrs-full_CurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentLiabilities" xlink:label="ifrs-full_CurrentLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossProfit" xlink:label="ifrs-full_GrossProfit" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Liabilities" xlink:label="ifrs-full_Liabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncontrollingInterests" xlink:label="ifrs-full_NoncontrollingInterests" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentAssets" xlink:label="ifrs-full_NoncurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentLiabilities" xlink:label="ifrs-full_NoncurrentLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:label="ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:label="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TerniumSAMember" xlink:label="ts_TerniumSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UsiminasMember" xlink:label="ts_UsiminasMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_UsiminasMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentAssets" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentAssets" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Assets" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentLiabilities" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentLiabilities" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Liabilities" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncontrollingInterests" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Revenue" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_GrossProfit" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-13-receivables-non-current-components-of-receivables-non-current-details" xlink:href="ts-20191231.xsd#statement-note-13-receivables-non-current-components-of-receivables-non-current-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-13-receivables-non-current-components-of-receivables-non-current-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentDerivativeFinancialAssets" xlink:label="ifrs-full_NoncurrentDerivativeFinancialAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentPrepayments" xlink:label="ifrs-full_NoncurrentPrepayments" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentReceivablesDueFromRelatedParties" xlink:label="ifrs-full_NoncurrentReceivablesDueFromRelatedParties" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:label="ifrs-full_NoncurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherNoncurrentReceivables" xlink:label="ifrs-full_OtherNoncurrentReceivables" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NoncurrentReceivablesAdvancesToSuppliersAndOtherAdvances" xlink:label="ts_NoncurrentReceivablesAdvancesToSuppliersAndOtherAdvances" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NoncurrentReceivablesEmployeeAdvancesAndLoans" xlink:label="ts_NoncurrentReceivablesEmployeeAdvancesAndLoans" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ReceivablesFromInterestInVenezuelanCompanies" xlink:label="ts_ReceivablesFromInterestInVenezuelanCompanies" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TradeAndOtherNoncurrentReceivablesBeforeTheAllowanceForDoubtfulAccounts" xlink:label="ts_TradeAndOtherNoncurrentReceivablesBeforeTheAllowanceForDoubtfulAccounts" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NoncurrentReceivablesEmployeeAdvancesAndLoans" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentReceivablesDueFromRelatedParties" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentPrepayments" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NoncurrentReceivablesAdvancesToSuppliersAndOtherAdvances" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentDerivativeFinancialAssets" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ReceivablesFromInterestInVenezuelanCompanies" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherNoncurrentReceivables" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_TradeAndOtherNoncurrentReceivablesBeforeTheAllowanceForDoubtfulAccounts" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-14-inventories-net-components-of-inventories-details" xlink:href="ts-20191231.xsd#statement-note-14-inventories-net-components-of-inventories-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-14-inventories-net-components-of-inventories-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentInventoriesInTransit" xlink:label="ifrs-full_CurrentInventoriesInTransit" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinishedGoods" xlink:label="ifrs-full_FinishedGoods" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Inventories" xlink:label="ifrs-full_Inventories" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductionSupplies" xlink:label="ifrs-full_ProductionSupplies" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RawMaterials" xlink:label="ifrs-full_RawMaterials" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_WorkInProgress" xlink:label="ifrs-full_WorkInProgress" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_InventoriesAllowanceForObsolescence" xlink:label="ts_InventoriesAllowanceForObsolescence" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_InventoriesGross" xlink:label="ts_InventoriesGross" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_FinishedGoods" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_WorkInProgress" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_RawMaterials" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProductionSupplies" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentInventoriesInTransit" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_InventoriesGross" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_InventoriesAllowanceForObsolescence" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Inventories" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-15-receivables-and-prepayments-net-summary-of-receivables-and-prepayments-details" xlink:href="ts-20191231.xsd#statement-note-15-receivables-and-prepayments-net-summary-of-receivables-and-prepayments-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-15-receivables-and-prepayments-net-summary-of-receivables-and-prepayments-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets" xlink:label="ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AllowanceForOtherDoubtfulAccounts" xlink:label="ts_AllowanceForOtherDoubtfulAccounts" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ReceivablesAndPrepaymentsAdvancesToSuppliersAndOtherAdvances" xlink:label="ts_ReceivablesAndPrepaymentsAdvancesToSuppliersAndOtherAdvances" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ReceivablesAndPrepaymentsEmployeeAdvancesAndLoans" xlink:label="ts_ReceivablesAndPrepaymentsEmployeeAdvancesAndLoans" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ReceivablesAndPrepaymentsGovernmentEntities" xlink:label="ts_ReceivablesAndPrepaymentsGovernmentEntities" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ReceivablesAndPrepaymentsGovernmentTaxRefundsOnExports" xlink:label="ts_ReceivablesAndPrepaymentsGovernmentTaxRefundsOnExports" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ReceivablesAndPrepaymentsGross" xlink:label="ts_ReceivablesAndPrepaymentsGross" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ReceivablesAndPrepaymentsMiscellaneous" xlink:label="ts_ReceivablesAndPrepaymentsMiscellaneous" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ReceivablesAndPrepaymentsPrepaidExpensesAndOtherReceivables" xlink:label="ts_ReceivablesAndPrepaymentsPrepaidExpensesAndOtherReceivables" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ReceivablesAndPrepaymentsReceivablesFromRelatedParties" xlink:label="ts_ReceivablesAndPrepaymentsReceivablesFromRelatedParties" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ReceivablesAndPrepaymentsPrepaidExpensesAndOtherReceivables" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ReceivablesAndPrepaymentsGovernmentEntities" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ReceivablesAndPrepaymentsEmployeeAdvancesAndLoans" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ReceivablesAndPrepaymentsAdvancesToSuppliersAndOtherAdvances" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ReceivablesAndPrepaymentsGovernmentTaxRefundsOnExports" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ReceivablesAndPrepaymentsReceivablesFromRelatedParties" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ReceivablesAndPrepaymentsMiscellaneous" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ReceivablesAndPrepaymentsGross" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_AllowanceForOtherDoubtfulAccounts" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-16-current-tax-assets-and-liabilities-summary-of-current-tax-assets-details" xlink:href="ts-20191231.xsd#statement-note-16-current-tax-assets-and-liabilities-summary-of-current-tax-assets-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-16-current-tax-assets-and-liabilities-summary-of-current-tax-assets-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentTaxAssetsCurrent" xlink:label="ifrs-full_CurrentTaxAssetsCurrent" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentValueAddedTaxReceivables" xlink:label="ifrs-full_CurrentValueAddedTaxReceivables" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentPrepaidTaxes" xlink:label="ts_CurrentPrepaidTaxes" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentValueAddedTaxReceivables" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentPrepaidTaxes" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentTaxAssetsCurrent" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-16-current-tax-assets-and-liabilities-summary-of-current-tax-liabilities-details" xlink:href="ts-20191231.xsd#statement-note-16-current-tax-assets-and-liabilities-summary-of-current-tax-liabilities-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-16-current-tax-assets-and-liabilities-summary-of-current-tax-liabilities-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:label="ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentValueAddedTaxPayables" xlink:label="ifrs-full_CurrentValueAddedTaxPayables" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentIncomeTaxLiabilities" xlink:label="ts_CurrentIncomeTaxLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentOtherTaxLiabilities" xlink:label="ts_CurrentOtherTaxLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentIncomeTaxLiabilities" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentValueAddedTaxPayables" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentOtherTaxLiabilities" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-17-trade-receivables-net-summary-of-current-trade-receivables-details" xlink:href="ts-20191231.xsd#statement-note-17-trade-receivables-net-summary-of-current-trade-receivables-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-17-trade-receivables-net-summary-of-current-trade-receivables-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentTradeReceivables" xlink:label="ifrs-full_CurrentTradeReceivables" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:label="ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentTradeReceivablesAllowanceForDoubtfulAccounts" xlink:label="ts_CurrentTradeReceivablesAllowanceForDoubtfulAccounts" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentTradeReceivablesCurrentAccounts" xlink:label="ts_CurrentTradeReceivablesCurrentAccounts" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentTradeReceivablesGross" xlink:label="ts_CurrentTradeReceivablesGross" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentTradeReceivablesCurrentAccounts" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentTradeReceivablesGross" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentTradeReceivablesAllowanceForDoubtfulAccounts" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentTradeReceivables" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-maturity-of-borrowings-details" xlink:href="ts-20191231.xsd#statement-note-19-borrowings-maturity-of-borrowings-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-maturity-of-borrowings-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Borrowings" xlink:label="ifrs-full_Borrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestPayable" xlink:label="ifrs-full_InterestPayable" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanFiveYearsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:label="ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember" xlink:label="ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:label="ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="ifrs-full_MaturityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NotLaterThanOneYearMember" xlink:label="ifrs-full_NotLaterThanOneYearMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_BorrowingsIncludingInterestToBeAccrued" xlink:label="ts_BorrowingsIncludingInterestToBeAccrued" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FinanceLeaseLiabilitiesMember" xlink:label="ts_FinanceLeaseLiabilitiesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NoncurrentBorrowingsBeforeCostsOfIssueOfDebt" xlink:label="ts_NoncurrentBorrowingsBeforeCostsOfIssueOfDebt" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherBorrowingsMember" xlink:label="ts_OtherBorrowingsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BorrowingsByNameAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="ts_OtherBorrowingsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_MaturityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_NotLaterThanOneYearMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="ts_FinanceLeaseLiabilitiesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanFiveYearsMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Borrowings" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_InterestPayable" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_BorrowingsIncludingInterestToBeAccrued" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NoncurrentBorrowingsBeforeCostsOfIssueOfDebt" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-significant-borrowings-as-of-closing-date-details" xlink:href="ts-20191231.xsd#statement-note-19-borrowings-significant-borrowings-as-of-closing-date-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-significant-borrowings-as-of-closing-date-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Borrowings" xlink:label="ifrs-full_Borrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SidercaSaicAndSubsidiariesMember" xlink:label="ts_SidercaSaicAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SignificantBorrowingsAsOfClosingDateMember" xlink:label="ts_SignificantBorrowingsAsOfClosingDateMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TamsaHydrilAndOtherMember" xlink:label="ts_TamsaHydrilAndOtherMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BorrowingsByNameAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="ts_SignificantBorrowingsAsOfClosingDateMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TamsaHydrilAndOtherMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_SidercaSaicAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Borrowings" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-borrowings-evolution-details" xlink:href="ts-20191231.xsd#statement-note-19-borrowings-borrowings-evolution-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-borrowings-evolution-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:label="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LongtermBorrowings" xlink:label="ifrs-full_LongtermBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfBusinessCombinationsOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:label="ts_EffectOfBusinessCombinationsOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfBusinessCombinationsOnLongtermBorrowings" xlink:label="ts_EffectOfBusinessCombinationsOnLongtermBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfInterestsAccruedNetOfPaymentsOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:label="ts_EffectOfInterestsAccruedNetOfPaymentsOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfInterestsAccruedNetOfPaymentsOnLongtermBorrowings" xlink:label="ts_EffectOfInterestsAccruedNetOfPaymentsOnLongtermBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfNetProceedsAndRepaymentsOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:label="ts_EffectOfNetProceedsAndRepaymentsOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfNetProceedsAndRepaymentsOnLongtermBorrowings" xlink:label="ts_EffectOfNetProceedsAndRepaymentsOnLongtermBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfOverdraftsVariationOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:label="ts_EffectOfOverdraftsVariationOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfOverdraftsVariationOnLongtermBorrowings" xlink:label="ts_EffectOfOverdraftsVariationOnLongtermBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfReclassificationsOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:label="ts_EffectOfReclassificationsOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfReclassificationsOnLongtermBorrowings" xlink:label="ts_EffectOfReclassificationsOnLongtermBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfTranslationDifferencesOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:label="ts_EffectOfTranslationDifferencesOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EffectOfTranslationDifferencesOnLongtermBorrowings" xlink:label="ts_EffectOfTranslationDifferencesOnLongtermBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_LongtermBorrowings" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfTranslationDifferencesOnLongtermBorrowings" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfTranslationDifferencesOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfNetProceedsAndRepaymentsOnLongtermBorrowings" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfNetProceedsAndRepaymentsOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfInterestsAccruedNetOfPaymentsOnLongtermBorrowings" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfInterestsAccruedNetOfPaymentsOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfReclassificationsOnLongtermBorrowings" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfReclassificationsOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfBusinessCombinationsOnLongtermBorrowings" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfBusinessCombinationsOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfOverdraftsVariationOnLongtermBorrowings" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EffectOfOverdraftsVariationOnCurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-20-deferred-income-tax-recovery-analysis-of-deferred-tax-assets-and-liabilities-details" xlink:href="ts-20191231.xsd#statement-note-20-deferred-income-tax-recovery-analysis-of-deferred-tax-assets-and-liabilities-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-20-deferred-income-tax-recovery-analysis-of-deferred-tax-assets-and-liabilities-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxAssets" xlink:label="ifrs-full_DeferredTaxAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxLiabilities" xlink:label="ifrs-full_DeferredTaxLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanOneYearMember" xlink:label="ifrs-full_LaterThanOneYearMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="ifrs-full_MaturityAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_MaturityAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanOneYearMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxAssets" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxLiabilities" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-20-deferred-income-tax-net-deferred-tax-liabilities-assets-details" xlink:href="ts-20191231.xsd#statement-note-20-deferred-income-tax-net-deferred-tax-liabilities-assets-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-20-deferred-income-tax-net-deferred-tax-liabilities-assets-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxAssets" xlink:label="ifrs-full_DeferredTaxAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss" xlink:label="ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxLiabilities" xlink:label="ifrs-full_DeferredTaxLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxLiabilityAsset" xlink:label="ifrs-full_DeferredTaxLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome" xlink:label="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset" xlink:label="ifrs-full_IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DeferredTaxLiabilityIncreaseDecreaseDueToAdoptionOfNewAccountingStandards" xlink:label="ts_DeferredTaxLiabilityIncreaseDecreaseDueToAdoptionOfNewAccountingStandards" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxAssets" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxLiabilities" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DeferredTaxLiabilityIncreaseDecreaseDueToAdoptionOfNewAccountingStandards" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-other-noncurrent-liabilities-details" xlink:href="ts-20191231.xsd#statement-note-21-other-liabilities-other-noncurrent-liabilities-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-other-noncurrent-liabilities-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherNoncurrentLiabilities" xlink:label="ifrs-full_OtherNoncurrentLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NoncurrentPostemploymentBenefits" xlink:label="ts_NoncurrentPostemploymentBenefits" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherNoncurrentBenefits" xlink:label="ts_OtherNoncurrentBenefits" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherNoncurrentMiscellaneousLiabilities" xlink:label="ts_OtherNoncurrentMiscellaneousLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NoncurrentPostemploymentBenefits" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherNoncurrentBenefits" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherNoncurrentMiscellaneousLiabilities" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherNoncurrentLiabilities" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-postemployment-benefits-details" xlink:href="ts-20191231.xsd#statement-note-21-other-liabilities-postemployment-benefits-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-postemployment-benefits-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitObligationAtPresentValue" xlink:label="ifrs-full_DefinedBenefitObligationAtPresentValue" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis" xlink:label="ifrs-full_DefinedBenefitPlansAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughBusinessCombinationsAndDisposalsNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_IncreaseDecreaseThroughBusinessCombinationsAndDisposalsNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:label="ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PlanAssetsAtFairValue" xlink:label="ifrs-full_PlanAssetsAtFairValue" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SurplusDeficitInPlan" xlink:label="ifrs-full_SurplusDeficitInPlan" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FundedPostemploymentBenefitsMember" xlink:label="ts_FundedPostemploymentBenefitsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NoncurrentPostemploymentBenefits" xlink:label="ts_NoncurrentPostemploymentBenefits" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UnfundedPostemploymentBenefitsMember" xlink:label="ts_UnfundedPostemploymentBenefitsMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_DefinedBenefitPlansAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_UnfundedPostemploymentBenefitsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_FundedPostemploymentBenefitsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NoncurrentPostemploymentBenefits" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughBusinessCombinationsAndDisposalsNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DefinedBenefitObligationAtPresentValue" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PlanAssetsAtFairValue" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_SurplusDeficitInPlan" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-plan-assets-details" xlink:href="ts-20191231.xsd#statement-note-21-other-liabilities-plan-assets-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-plan-assets-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContributionsToPlanNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_ContributionsToPlanNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis" xlink:label="ifrs-full_DefinedBenefitPlansAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:label="ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DebtInstrumentsPercentContributedToFairValueOfPlanAssets" xlink:label="ts_DebtInstrumentsPercentContributedToFairValueOfPlanAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EquityInstrumentsPercentContributedToFairValueOfPlanAssets" xlink:label="ts_EquityInstrumentsPercentContributedToFairValueOfPlanAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FairValueOfFundedPostemploymentBenefitsMember" xlink:label="ts_FairValueOfFundedPostemploymentBenefitsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FundedPostemploymentBenefitsMember" xlink:label="ts_FundedPostemploymentBenefitsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherAssetsPercentContributedToFairValueOfPlanAssets" xlink:label="ts_OtherAssetsPercentContributedToFairValueOfPlanAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_DefinedBenefitPlansAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_FairValueOfFundedPostemploymentBenefitsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="ts_FundedPostemploymentBenefitsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ContributionsToPlanNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EquityInstrumentsPercentContributedToFairValueOfPlanAssets" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DebtInstrumentsPercentContributedToFairValueOfPlanAssets" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherAssetsPercentContributedToFairValueOfPlanAssets" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-other-current-liabilities-details" xlink:href="ts-20191231.xsd#statement-note-21-other-liabilities-other-current-liabilities-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-21-other-liabilities-other-current-liabilities-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherCurrentLiabilities" xlink:label="ifrs-full_OtherCurrentLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentEmployeeRelatedLiabilities" xlink:label="ts_CurrentEmployeeRelatedLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherCurrentMiscellaneousLiabilities" xlink:label="ts_OtherCurrentMiscellaneousLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentEmployeeRelatedLiabilities" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherCurrentMiscellaneousLiabilities" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherCurrentLiabilities" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-22-noncurrent-allowances-and-provisions-liabilities-details" xlink:href="ts-20191231.xsd#statement-note-22-noncurrent-allowances-and-provisions-liabilities-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-22-noncurrent-allowances-and-provisions-liabilities-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdditionalProvisionsOtherProvisions" xlink:label="ifrs-full_AdditionalProvisionsOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ifrs-full_ClassesOfProvisionsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions" xlink:label="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisions" xlink:label="ifrs-full_OtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProvisionUsedOtherProvisions" xlink:label="ifrs-full_ProvisionUsedOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ProvisionForNoncurrentLiabilitiesMember" xlink:label="ts_ProvisionForNoncurrentLiabilitiesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfProvisionsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="ts_ProvisionForNoncurrentLiabilitiesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AdditionalProvisionsOtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProvisionUsedOtherProvisions" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-23-current-allowances-and-provisions-deducted-from-assets-details" xlink:href="ts-20191231.xsd#statement-note-23-current-allowances-and-provisions-deducted-from-assets-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-23-current-allowances-and-provisions-deducted-from-assets-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsOtherProvisions" xlink:label="ifrs-full_AcquisitionsThroughBusinessCombinationsOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets" xlink:label="ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ifrs-full_ClassesOfProvisionsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_UtilisationAllowanceAccountForCreditLossesOfFinancialAssets" xlink:label="ifrs-full_UtilisationAllowanceAccountForCreditLossesOfFinancialAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AllowanceForDoubtfulAccountsTradeReceivablesMember" xlink:label="ts_AllowanceForDoubtfulAccountsTradeReceivablesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AllowanceForInventoryObsolescenceMember" xlink:label="ts_AllowanceForInventoryObsolescenceMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AllowanceForOtherDoubtfulAccountsOtherReceivablesMember" xlink:label="ts_AllowanceForOtherDoubtfulAccountsOtherReceivablesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_IncreaseDecreaseAdditionalAllowancesOtherProvisions" xlink:label="ts_IncreaseDecreaseAdditionalAllowancesOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_IncreaseDecreaseDueToEffectOfAdoptionOfNewAccountingStandardsOtherProvisions" xlink:label="ts_IncreaseDecreaseDueToEffectOfAdoptionOfNewAccountingStandardsOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_IncreaseDecreaseThroughReversalsAndAdditionalAllowances" xlink:label="ts_IncreaseDecreaseThroughReversalsAndAdditionalAllowances" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfProvisionsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="ts_AllowanceForDoubtfulAccountsTradeReceivablesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="ts_AllowanceForOtherDoubtfulAccountsOtherReceivablesMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="ts_AllowanceForInventoryObsolescenceMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AllowanceAccountForCreditLossesOfFinancialAssets" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AcquisitionsThroughBusinessCombinationsOtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_IncreaseDecreaseThroughReversalsAndAdditionalAllowances" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_UtilisationAllowanceAccountForCreditLossesOfFinancialAssets" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_IncreaseDecreaseDueToEffectOfAdoptionOfNewAccountingStandardsOtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_IncreaseDecreaseAdditionalAllowancesOtherProvisions" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-24-derivative-financial-instruments-net-fair-values-details" xlink:href="ts-20191231.xsd#statement-note-24-derivative-financial-instruments-net-fair-values-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-24-derivative-financial-instruments-net-fair-values-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DerivativeFinancialAssets" xlink:label="ifrs-full_DerivativeFinancialAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DerivativeFinancialLiabilities" xlink:label="ifrs-full_DerivativeFinancialLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskAxis" xlink:label="ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskMember" xlink:label="ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskMember" xlink:label="ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DerivativeFinancialAssetsLiabilities" xlink:label="ts_DerivativeFinancialAssetsLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DerivativesHedgingBorrowingsAndInvestmentsMember" xlink:label="ts_DerivativesHedgingBorrowingsAndInvestmentsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherDerivativesMember" xlink:label="ts_OtherDerivativesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskAxis" xlink:to="ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskMember" xlink:to="ts_DerivativesHedgingBorrowingsAndInvestmentsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskAxis" xlink:to="ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskMember" xlink:to="ts_OtherDerivativesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DerivativeFinancialAssets" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DerivativeFinancialLiabilities" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DerivativeFinancialAssetsLiabilities" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-27-business-combinations-assets-and-liabilities-assumed-details" xlink:href="ts-20191231.xsd#statement-note-27-business-combinations-assets-and-liabilities-assumed-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-27-business-combinations-assets-and-liabilities-assumed-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_BorrowingsRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CustomerrelatedIntangibleAssetsRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_CustomerrelatedIntangibleAssetsRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed" xlink:label="ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EmployeeServiceBenefitsRecognisedAsOfAcquisitionDate" xlink:label="ts_EmployeeServiceBenefitsRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_InvestmentsRecognisedAsOfAcquisitionDate" xlink:label="ts_InvestmentsRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherReceivablesRecognisedAsOfAcquisitionDate" xlink:label="ts_OtherReceivablesRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SaudiSteelPipeCompanyMember" xlink:label="ts_SaudiSteelPipeCompanyMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_WorkingCapitalRecognisedAsOfAcquisitionDate" xlink:label="ts_WorkingCapitalRecognisedAsOfAcquisitionDate" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_SaudiSteelPipeCompanyMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CustomerrelatedIntangibleAssetsRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_InvestmentsRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_WorkingCapitalRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherReceivablesRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_BorrowingsRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EmployeeServiceBenefitsRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-29-discontinued-operations-components-of-discontinued-operations-net-income-details" xlink:href="ts-20191231.xsd#statement-note-29-discontinued-operations-components-of-discontinued-operations-net-income-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-29-discontinued-operations-components-of-discontinued-operations-net-income-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation" xlink:label="ifrs-full_GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeFromDiscontinuedOperationsAttributableToOwnersOfParent" xlink:label="ifrs-full_IncomeFromDiscontinuedOperationsAttributableToOwnersOfParent" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossFromDiscontinuedOperations" xlink:label="ifrs-full_ProfitLossFromDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncomeFromDiscontinuedOperationsAttributableToOwnersOfParent" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProfitLossFromDiscontinuedOperations" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-29-discontinued-operations-discontinued-operations-details" xlink:href="ts-20191231.xsd#statement-note-29-discontinued-operations-discontinued-operations-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-29-discontinued-operations-discontinued-operations-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale" xlink:label="ifrs-full_CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivitiesDiscontinuedOperations" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivitiesDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:label="ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContinuingOperationsMember" xlink:label="ifrs-full_ContinuingOperationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContinuingOperationsMember" xlink:label="ifrs-full_ContinuingOperationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentAssets" xlink:label="ifrs-full_CurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentLiabilities" xlink:label="ifrs-full_CurrentLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DiscontinuedOperationsMember" xlink:label="ifrs-full_DiscontinuedOperationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisposalGroupsClassifiedAsHeldForSaleMember" xlink:label="ifrs-full_DisposalGroupsClassifiedAsHeldForSaleMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossProfit" xlink:label="ifrs-full_GrossProfit" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeFromDiscontinuedOperationsAttributableToOwnersOfParent" xlink:label="ifrs-full_IncomeFromDiscontinuedOperationsAttributableToOwnersOfParent" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsDiscontinuedOperations" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale" xlink:label="ifrs-full_LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentAssets" xlink:label="ifrs-full_NoncurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners" xlink:label="ifrs-full_NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentLiabilities" xlink:label="ifrs-full_NoncurrentLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:to="ifrs-full_ContinuingOperationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContinuingOperationsMember" xlink:to="ifrs-full_DiscontinuedOperationsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:to="ifrs-full_ContinuingOperationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContinuingOperationsMember" xlink:to="ifrs-full_DisposalGroupsClassifiedAsHeldForSaleMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Revenue" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_GrossProfit" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncomeFromDiscontinuedOperationsAttributableToOwnersOfParent" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashFlowsFromUsedInFinancingActivitiesDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentAssets" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentAssets" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentLiabilities" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentLiabilities" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-31-fees-paid-to-the-companys-principal-accountant-fees-accrued-for-professional-services-details" xlink:href="ts-20191231.xsd#statement-note-31-fees-paid-to-the-companys-principal-accountant-fees-accrued-for-professional-services-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-31-fees-paid-to-the-companys-principal-accountant-fees-accrued-for-professional-services-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AuditorsRemuneration" xlink:label="ifrs-full_AuditorsRemuneration" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AuditorsRemunerationForAuditServices" xlink:label="ifrs-full_AuditorsRemunerationForAuditServices" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AuditorsRemunerationForOtherServices" xlink:label="ifrs-full_AuditorsRemunerationForOtherServices" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AuditorsRemunerationForTaxServices" xlink:label="ifrs-full_AuditorsRemunerationForTaxServices" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AuditorsRemunerationForAuditrelatedFees" xlink:label="ts_AuditorsRemunerationForAuditrelatedFees" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AuditorsRemunerationForAuditServices" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_AuditorsRemunerationForAuditrelatedFees" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AuditorsRemunerationForTaxServices" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AuditorsRemunerationForOtherServices" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AuditorsRemuneration" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-32-principal-subsidiaries-percentage-of-ownership-of-each-controlled-company-details" xlink:href="ts-20191231.xsd#statement-note-32-principal-subsidiaries-percentage-of-ownership-of-each-controlled-company-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-32-principal-subsidiaries-percentage-of-ownership-of-each-controlled-company-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_AR" xlink:label="country_AR" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_BR" xlink:label="country_BR" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_CA" xlink:label="country_CA" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_CH" xlink:label="country_CH" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_GB" xlink:label="country_GB" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_ID" xlink:label="country_ID" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_IT" xlink:label="country_IT" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_JP" xlink:label="country_JP" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_KZ" xlink:label="country_KZ" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_LU" xlink:label="country_LU" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_MX" xlink:label="country_MX" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_NL" xlink:label="country_NL" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_PT" xlink:label="country_PT" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_RO" xlink:label="country_RO" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_SA" xlink:label="country_SA" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US" xlink:label="country_US" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_UY" xlink:label="country_UY" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:label="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AlgomaTubesIncMember" xlink:label="ts_AlgomaTubesIncMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_Colombia1Member" xlink:label="ts_Colombia1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:label="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DalmineSPAMember" xlink:label="ts_DalmineSPAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_HydrilCompanyAndSubsidiariesMember" xlink:label="ts_HydrilCompanyAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_KazakhstanPipeThreadersLimitedMember" xlink:label="ts_KazakhstanPipeThreadersLimitedMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MaverickTubeCorporationAndSubsidiariesMember" xlink:label="ts_MaverickTubeCorporationAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NkktubesMember" xlink:label="ts_NkktubesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PrudentialSteelLtdMember" xlink:label="ts_PrudentialSteelLtdMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PtSeamlessPipeIndonesiaJayaMember" xlink:label="ts_PtSeamlessPipeIndonesiaJayaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SaudiSteelPipeCompanyMember" xlink:label="ts_SaudiSteelPipeCompanyMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ScSilcotubSaMember" xlink:label="ts_ScSilcotubSaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SiatSociedadAnonimaMember" xlink:label="ts_SiatSociedadAnonimaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SidercaSaicAndSubsidiariesMember" xlink:label="ts_SidercaSaicAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaltatradingEMarketingSociedadeUnipessoalLdaMember" xlink:label="ts_TaltatradingEMarketingSociedadeUnipessoalLdaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisBayCityIncMember" xlink:label="ts_TenarisBayCityIncMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisConnectionsBvMember" xlink:label="ts_TenarisConnectionsBvMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisFinancialServicesSaMember" xlink:label="ts_TenarisFinancialServicesSaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisGlobalServicesCanadaIncMember" xlink:label="ts_TenarisGlobalServicesCanadaIncMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisGlobalServicesSaAndSubsidiariesMember" xlink:label="ts_TenarisGlobalServicesSaAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisGlobalServicesUkLtdMember" xlink:label="ts_TenarisGlobalServicesUkLtdMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisGlobalServicesUsaCorporationMember" xlink:label="ts_TenarisGlobalServicesUsaCorporationMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisInvestmentsNLBVMember" xlink:label="ts_TenarisInvestmentsNLBVMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisInvestmentsSrlMember" xlink:label="ts_TenarisInvestmentsSrlMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisInvestmentsSwitzerlandAgAndSubsidiariesMember" xlink:label="ts_TenarisInvestmentsSwitzerlandAgAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TenarisTubocaribeLtdaMember" xlink:label="ts_TenarisTubocaribeLtdaMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TubosDeAceroDeMexicoSaMember" xlink:label="ts_TubosDeAceroDeMexicoSaMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_CA" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_AlgomaTubesIncMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_BR" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_IT" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_DalmineSPAMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_US" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_HydrilCompanyAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_KZ" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_KazakhstanPipeThreadersLimitedMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_MaverickTubeCorporationAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_JP" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_NkktubesMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_ID" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_PtSeamlessPipeIndonesiaJayaMember" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_PrudentialSteelLtdMember" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_RO" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_ScSilcotubSaMember" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_SA" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_SaudiSteelPipeCompanyMember" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_AR" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_SiatSociedadAnonimaMember" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_SidercaSaicAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_PT" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TaltatradingEMarketingSociedadeUnipessoalLdaMember" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisBayCityIncMember" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_NL" xlink:type="arc"/>
    <link:definitionArc order="15" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisConnectionsBvMember" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_UY" xlink:type="arc"/>
    <link:definitionArc order="16" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisFinancialServicesSaMember" xlink:type="arc"/>
    <link:definitionArc order="17" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisGlobalServicesCanadaIncMember" xlink:type="arc"/>
    <link:definitionArc order="18" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisGlobalServicesUsaCorporationMember" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_GB" xlink:type="arc"/>
    <link:definitionArc order="19" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisGlobalServicesUkLtdMember" xlink:type="arc"/>
    <link:definitionArc order="20" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisGlobalServicesSaAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="21" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisInvestmentsNLBVMember" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_LU" xlink:type="arc"/>
    <link:definitionArc order="22" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisInvestmentsSrlMember" xlink:type="arc"/>
    <link:definitionArc order="15" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_CH" xlink:type="arc"/>
    <link:definitionArc order="23" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisInvestmentsSwitzerlandAgAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="16" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ts_Colombia1Member" xlink:type="arc"/>
    <link:definitionArc order="24" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TenarisTubocaribeLtdaMember" xlink:type="arc"/>
    <link:definitionArc order="17" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_MX" xlink:type="arc"/>
    <link:definitionArc order="25" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="ts_TubosDeAceroDeMexicoSaMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-borrowings-by-currency-and-rate-details" xlink:href="ts-20191231.xsd#statement-note-19-borrowings-borrowings-by-currency-and-rate-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-borrowings-by-currency-and-rate-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd#currency_ARS" xlink:label="currency_ARS" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="currency_AllCurrenciesDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="currency_AllCurrenciesDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd#currency_EUR" xlink:label="currency_EUR" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd#currency_MXN" xlink:label="currency_MXN" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd#currency_SAR" xlink:label="currency_SAR" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd#currency_USD" xlink:label="currency_USD" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:label="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FixedInterestRateMember" xlink:label="ifrs-full_FixedInterestRateMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FloatingInterestRateMember" xlink:label="ifrs-full_FloatingInterestRateMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LongtermBorrowings" xlink:label="ifrs-full_LongtermBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfInterestRatesAxis" xlink:label="ifrs-full_TypesOfInterestRatesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CurrencyAxis" xlink:label="srt_CurrencyAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherCurrencyMember" xlink:label="ts_OtherCurrencyMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_CurrencyAxis" xlink:to="currency_AllCurrenciesDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="srt_CurrencyAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="currency_USD" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_CurrencyAxis" xlink:to="currency_AllCurrenciesDomain-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfInterestRatesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="ifrs-full_FixedInterestRateMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="ifrs-full_FloatingInterestRateMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="currency_SAR" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="currency_EUR" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="currency_MXN" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="currency_ARS" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="ts_OtherCurrencyMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_LongtermBorrowings" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-28-cash-flow-disclosures-cash-flow-disclosures-details" xlink:href="ts-20191231.xsd#statement-note-28-cash-flow-disclosures-cash-flow-disclosures-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-28-cash-flow-disclosures-cash-flow-disclosures-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToCustomers" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToCustomers" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:label="ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInOtherLiabilities" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BankOverdraftsClassifiedAsCashEquivalents" xlink:label="ifrs-full_BankOverdraftsClassifiedAsCashEquivalents" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:label="ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:label="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:label="ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:label="ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:label="ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRevenueExpense" xlink:label="ifrs-full_InterestRevenueExpense" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AdjustmentsForIncreaseDecreaseInReceivablesAndPrepaymentsAndCurrentTaxAssets" xlink:label="ts_AdjustmentsForIncreaseDecreaseInReceivablesAndPrepaymentsAndCurrentTaxAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CashAndCashEquivalentsIncludingThePortionOfCashAndCashEquivalentsThatAreClassifiedAsAPartOfADisposalGroup" xlink:label="ts_CashAndCashEquivalentsIncludingThePortionOfCashAndCashEquivalentsThatAreClassifiedAsAPartOfADisposalGroup" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_IncomeTaxAccrualsLessPaymentsAbstract" xlink:label="ts_IncomeTaxAccrualsLessPaymentsAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_IncomeTaxesAccruedIncludingPortionOfSaleOfDiscontinuedOperations" xlink:label="ts_IncomeTaxesAccruedIncludingPortionOfSaleOfDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_InterestAccrualsLessPaymentsNetAbstract" xlink:label="ts_InterestAccrualsLessPaymentsNetAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_AdjustmentsForIncreaseDecreaseInReceivablesAndPrepaymentsAndCurrentTaxAssets" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherLiabilities" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToCustomers" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_IncomeTaxAccrualsLessPaymentsAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_IncomeTaxAccrualsLessPaymentsAbstract" xlink:to="ts_IncomeTaxesAccruedIncludingPortionOfSaleOfDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_IncomeTaxAccrualsLessPaymentsAbstract" xlink:to="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_IncomeTaxAccrualsLessPaymentsAbstract" xlink:to="ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_InterestAccrualsLessPaymentsNetAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_InterestAccrualsLessPaymentsNetAbstract" xlink:to="ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_InterestAccrualsLessPaymentsNetAbstract" xlink:to="ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_InterestAccrualsLessPaymentsNetAbstract" xlink:to="ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_InterestAccrualsLessPaymentsNetAbstract" xlink:to="ifrs-full_InterestRevenueExpense" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_InterestAccrualsLessPaymentsNetAbstract" xlink:to="ts_CashAndCashEquivalentsIncludingThePortionOfCashAndCashEquivalentsThatAreClassifiedAsAPartOfADisposalGroup" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_InterestAccrualsLessPaymentsNetAbstract" xlink:to="ifrs-full_BankOverdraftsClassifiedAsCashEquivalents" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_InterestAccrualsLessPaymentsNetAbstract" xlink:to="ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-12-investments-in-nonconsolidated-companies-principal-nonconsolidated-companies-details" xlink:href="ts-20191231.xsd#statement-note-12-investments-in-nonconsolidated-companies-principal-nonconsolidated-companies-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-12-investments-in-nonconsolidated-companies-principal-nonconsolidated-companies-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_BR" xlink:label="country_BR" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_LU" xlink:label="country_LU" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:label="ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:label="ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:label="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherMember" xlink:label="ts_OtherMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TerniumSAMember" xlink:label="ts_TerniumSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_UsiminasMember" xlink:label="ts_UsiminasMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_TerniumSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_LU" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_UsiminasMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_BR" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="ts_OtherMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-24-derivative-financial-instruments-foreign-exchange-derivative-contracts-and-hedge-accounting-details" xlink:href="ts-20191231.xsd#statement-note-24-derivative-financial-instruments-foreign-exchange-derivative-contracts-and-hedge-accounting-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-24-derivative-financial-instruments-foreign-exchange-derivative-contracts-and-hedge-accounting-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowHedgesMember" xlink:label="ifrs-full_CashFlowHedgesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsAxis" xlink:label="ifrs-full_HedgingInstrumentsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsMember" xlink:label="ifrs-full_HedgingInstrumentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsMember" xlink:label="ifrs-full_HedgingInstrumentsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ReserveOfCashFlowHedgesContinuingHedges" xlink:label="ifrs-full_ReserveOfCashFlowHedgesContinuingHedges" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfHedgesAxis" xlink:label="ifrs-full_TypesOfHedgesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfHedgesMember" xlink:label="ifrs-full_TypesOfHedgesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfHedgesMember" xlink:label="ifrs-full_TypesOfHedgesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DerivativeFinancialAssetsLiabilities" xlink:label="ts_DerivativeFinancialAssetsLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeContractOtherMember" xlink:label="ts_ForeignExchangeContractOtherMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeContractPurchaseCurrencyArsSellCurrencyUsdMember" xlink:label="ts_ForeignExchangeContractPurchaseCurrencyArsSellCurrencyUsdMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeContractPurchaseCurrencyEurSellCurrencyUsdMember" xlink:label="ts_ForeignExchangeContractPurchaseCurrencyEurSellCurrencyUsdMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeContractPurchaseCurrencyJpySellCurrencyUsdMember" xlink:label="ts_ForeignExchangeContractPurchaseCurrencyJpySellCurrencyUsdMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeContractPurchaseCurrencyMxnSellCurrencyUsdMember" xlink:label="ts_ForeignExchangeContractPurchaseCurrencyMxnSellCurrencyUsdMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyArsMember" xlink:label="ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyArsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyBrlMember" xlink:label="ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyBrlMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyEurMember" xlink:label="ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyEurMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyGpbMember" xlink:label="ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyGpbMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyKwdMember" xlink:label="ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyKwdMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyMxnMember" xlink:label="ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyMxnMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfHedgesAxis" xlink:to="ifrs-full_TypesOfHedgesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_HedgingInstrumentsAxis" xlink:to="ifrs-full_HedgingInstrumentsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_HedgingInstrumentsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeContractPurchaseCurrencyMxnSellCurrencyUsdMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_HedgingInstrumentsAxis" xlink:to="ifrs-full_HedgingInstrumentsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfHedgesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfHedgesMember" xlink:to="ifrs-full_CashFlowHedgesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfHedgesAxis" xlink:to="ifrs-full_TypesOfHedgesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyMxnMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeContractPurchaseCurrencyArsSellCurrencyUsdMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeContractPurchaseCurrencyEurSellCurrencyUsdMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyEurMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyKwdMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeContractPurchaseCurrencyJpySellCurrencyUsdMember" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyArsMember" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyBrlMember" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeContractPurchaseCurrencyUsdSellCurrencyGpbMember" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="ts_ForeignExchangeContractOtherMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DerivativeFinancialAssetsLiabilities" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ReserveOfCashFlowHedgesContinuingHedges" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-5-other-operating-income-and-expenses-components-of-other-operating-income-and-expenses-details" xlink:href="ts-20191231.xsd#statement-note-5-other-operating-income-and-expenses-components-of-other-operating-income-and-expenses-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-5-other-operating-income-and-expenses-components-of-other-operating-income-and-expenses-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment" xlink:label="ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MiscellaneousOtherOperatingIncome" xlink:label="ifrs-full_MiscellaneousOtherOperatingIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherExpenseByFunction" xlink:label="ifrs-full_OtherExpenseByFunction" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherIncome" xlink:label="ifrs-full_OtherIncome" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherExpenseIncludingDiscontinuedOperations" xlink:label="ts_OtherExpenseIncludingDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherOperatingExpenseContributionsToWelfareProjectsAndNonprofitsOrganizations" xlink:label="ts_OtherOperatingExpenseContributionsToWelfareProjectsAndNonprofitsOrganizations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherOperatingExpenseDiscontinuedOperations" xlink:label="ts_OtherOperatingExpenseDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherOperatingExpensesAbstract" xlink:label="ts_OtherOperatingExpensesAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherOperatingExpensesAllowanceForDoubtfulReceivables" xlink:label="ts_OtherOperatingExpensesAllowanceForDoubtfulReceivables" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherOperatingIncomeAbstract" xlink:label="ts_OtherOperatingIncomeAbstract" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherOperatingIncomeNetIncomeFromOtherSales" xlink:label="ts_OtherOperatingIncomeNetIncomeFromOtherSales" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherOperatingIncomeNetRents" xlink:label="ts_OtherOperatingIncomeNetRents" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherOperatingIncomeRecoveryOnAllowanceForDoubtfulAccounts" xlink:label="ts_OtherOperatingIncomeRecoveryOnAllowanceForDoubtfulAccounts" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherOperatingIncomeAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherOperatingIncomeAbstract" xlink:to="ts_OtherOperatingIncomeNetIncomeFromOtherSales" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherOperatingIncomeAbstract" xlink:to="ts_OtherOperatingIncomeNetRents" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherOperatingIncomeAbstract" xlink:to="ifrs-full_MiscellaneousOtherOperatingIncome" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherOperatingIncomeAbstract" xlink:to="ts_OtherOperatingIncomeRecoveryOnAllowanceForDoubtfulAccounts" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherOperatingIncomeAbstract" xlink:to="ifrs-full_OtherIncome" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherOperatingExpensesAbstract" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherOperatingExpensesAbstract" xlink:to="ts_OtherOperatingExpenseContributionsToWelfareProjectsAndNonprofitsOrganizations" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherOperatingExpensesAbstract" xlink:to="ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherOperatingExpensesAbstract" xlink:to="ts_OtherOperatingExpensesAllowanceForDoubtfulReceivables" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherOperatingExpensesAbstract" xlink:to="ts_OtherExpenseIncludingDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherOperatingExpensesAbstract" xlink:to="ts_OtherOperatingExpenseDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_OtherOperatingExpensesAbstract" xlink:to="ifrs-full_OtherExpenseByFunction" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-financial-risk-management-proportions-of-variablerate-and-fixedrate-debt-details" xlink:href="ts-20191231.xsd#statement-financial-risk-management-proportions-of-variablerate-and-fixedrate-debt-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-financial-risk-management-proportions-of-variablerate-and-fixedrate-debt-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Borrowings" xlink:label="ifrs-full_Borrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FixedInterestRateMember" xlink:label="ifrs-full_FixedInterestRateMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FloatingInterestRateMember" xlink:label="ifrs-full_FloatingInterestRateMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfInterestRatesAxis" xlink:label="ifrs-full_TypesOfInterestRatesAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConcentrationRiskPercentage" xlink:label="ts_ConcentrationRiskPercentage" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_TypesOfInterestRatesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="ifrs-full_FixedInterestRateMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="ifrs-full_FloatingInterestRateMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Borrowings" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ConcentrationRiskPercentage" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-financial-risk-management-changes-in-level-3-assets-and-liabilities-details" xlink:href="ts-20191231.xsd#statement-financial-risk-management-changes-in-level-3-assets-and-liabilities-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-financial-risk-management-changes-in-level-3-assets-and-liabilities-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:label="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:label="ifrs-full_AllLevelsOfFairValueHierarchyMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Assets" xlink:label="ifrs-full_Assets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets" xlink:label="ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Level3OfFairValueHierarchyMember" xlink:label="ifrs-full_Level3OfFairValueHierarchyMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:label="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrencyTranslationAdjustmentAndOthersFairValueMeasurementAssets" xlink:label="ts_CurrencyTranslationAdjustmentAndOthersFairValueMeasurementAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:to="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:to="ifrs-full_Level3OfFairValueHierarchyMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:to="ifrs-full_AllLevelsOfFairValueHierarchyMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Assets" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrencyTranslationAdjustmentAndOthersFairValueMeasurementAssets" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-2-cost-of-sales-components-of-cost-of-sales-details" xlink:href="ts-20191231.xsd#statement-note-2-cost-of-sales-components-of-cost-of-sales-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-2-cost-of-sales-components-of-cost-of-sales-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CostOfSales" xlink:label="ifrs-full_CostOfSales" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Inventories" xlink:label="ifrs-full_Inventories" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CostOfSalesAllowanceForObsolescence" xlink:label="ts_CostOfSalesAllowanceForObsolescence" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CostOfSalesAmortizationOfIntangibleAssets" xlink:label="ts_CostOfSalesAmortizationOfIntangibleAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CostOfSalesDepreciationOfPropertyPlantAndEquipment" xlink:label="ts_CostOfSalesDepreciationOfPropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CostOfSalesDiscontinuedOperations" xlink:label="ts_CostOfSalesDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CostOfSalesIncludingDiscontinuedOperations" xlink:label="ts_CostOfSalesIncludingDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CostOfSalesLaborCost" xlink:label="ts_CostOfSalesLaborCost" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CostOfSalesMaintenanceExpenses" xlink:label="ts_CostOfSalesMaintenanceExpenses" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CostOfSalesOther" xlink:label="ts_CostOfSalesOther" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CostOfSalesRawMaterialsEnergyConsumablesAndOther" xlink:label="ts_CostOfSalesRawMaterialsEnergyConsumablesAndOther" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CostOfSalesServicesAndFees" xlink:label="ts_CostOfSalesServicesAndFees" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CostOfSalesTaxes" xlink:label="ts_CostOfSalesTaxes" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_DepreciationOfRightofuseAssetsInventoryImpactOnCostOfSales" xlink:label="ts_DepreciationOfRightofuseAssetsInventoryImpactOnCostOfSales" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_IncreaseInInventoryDueToBusinessCombinations" xlink:label="ts_IncreaseInInventoryDueToBusinessCombinations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_InventoriesIncludingDiscontinuedOperations" xlink:label="ts_InventoriesIncludingDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Inventories" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_IncreaseInInventoryDueToBusinessCombinations" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CostOfSalesRawMaterialsEnergyConsumablesAndOther" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CostOfSalesServicesAndFees" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CostOfSalesLaborCost" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CostOfSalesDepreciationOfPropertyPlantAndEquipment" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CostOfSalesAmortizationOfIntangibleAssets" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_DepreciationOfRightofuseAssetsInventoryImpactOnCostOfSales" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CostOfSalesMaintenanceExpenses" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CostOfSalesAllowanceForObsolescence" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CostOfSalesTaxes" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CostOfSalesOther" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CostOfSalesIncludingDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_InventoriesIncludingDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="15" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CostOfSalesDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="16" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CostOfSales" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-3-selling-general-and-administrative-expenses-components-of-selling-general-and-administrative-expenses-details" xlink:href="ts-20191231.xsd#statement-note-3-selling-general-and-administrative-expenses-components-of-selling-general-and-administrative-expenses-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-3-selling-general-and-administrative-expenses-components-of-selling-general-and-administrative-expenses-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:label="ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesAllowancesForDoubtfulAccounts" xlink:label="ts_SellingGeneralAndAdministrativeExpensesAllowancesForDoubtfulAccounts" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesAmortizationOfIntangibleAssets" xlink:label="ts_SellingGeneralAndAdministrativeExpensesAmortizationOfIntangibleAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesCommissionsFreightAndOtherSellingExpenses" xlink:label="ts_SellingGeneralAndAdministrativeExpensesCommissionsFreightAndOtherSellingExpenses" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesDepreciationOfPropertyPlantAndEquipment" xlink:label="ts_SellingGeneralAndAdministrativeExpensesDepreciationOfPropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesDepreciationOfRightofuseAssets" xlink:label="ts_SellingGeneralAndAdministrativeExpensesDepreciationOfRightofuseAssets" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesDiscontinuedOperations" xlink:label="ts_SellingGeneralAndAdministrativeExpensesDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesIncludingDiscontinuedOperations" xlink:label="ts_SellingGeneralAndAdministrativeExpensesIncludingDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesLaborCost" xlink:label="ts_SellingGeneralAndAdministrativeExpensesLaborCost" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesOther" xlink:label="ts_SellingGeneralAndAdministrativeExpensesOther" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesProvisionsForContingencies" xlink:label="ts_SellingGeneralAndAdministrativeExpensesProvisionsForContingencies" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesServicesAndFees" xlink:label="ts_SellingGeneralAndAdministrativeExpensesServicesAndFees" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SellingGeneralAndAdministrativeExpensesTaxes" xlink:label="ts_SellingGeneralAndAdministrativeExpensesTaxes" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesServicesAndFees" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesLaborCost" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesDepreciationOfPropertyPlantAndEquipment" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesAmortizationOfIntangibleAssets" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesDepreciationOfRightofuseAssets" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesCommissionsFreightAndOtherSellingExpenses" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesProvisionsForContingencies" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesAllowancesForDoubtfulAccounts" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesTaxes" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesOther" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesIncludingDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_SellingGeneralAndAdministrativeExpensesDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-4-labor-costs-summary-of-labor-costs-included-in-cost-of-sales-and-in-selling-general-and-administrative-expenses-details" xlink:href="ts-20191231.xsd#statement-note-4-labor-costs-summary-of-labor-costs-included-in-cost-of-sales-and-in-selling-general-and-administrative-expenses-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-4-labor-costs-summary-of-labor-costs-included-in-cost-of-sales-and-in-selling-general-and-administrative-expenses-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EmployeeBenefitsExpense" xlink:label="ifrs-full_EmployeeBenefitsExpense" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherLongtermBenefits" xlink:label="ifrs-full_OtherLongtermBenefits" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans" xlink:label="ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans" xlink:label="ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShorttermEmployeeBenefitsExpense" xlink:label="ifrs-full_ShorttermEmployeeBenefitsExpense" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TerminationBenefitsExpense" xlink:label="ifrs-full_TerminationBenefitsExpense" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EmployeeBenefitsExpenseDiscontinuedOperations" xlink:label="ts_EmployeeBenefitsExpenseDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_EmployeeBenefitsExpenseIncludingDiscontinuedOperations" xlink:label="ts_EmployeeBenefitsExpenseIncludingDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ShorttermEmployeeBenefitsExpense" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_TerminationBenefitsExpense" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherLongtermBenefits" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EmployeeBenefitsExpenseIncludingDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_EmployeeBenefitsExpenseDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_EmployeeBenefitsExpense" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-6-financial-results-financial-income-cost-details" xlink:href="ts-20191231.xsd#statement-note-6-financial-results-financial-income-cost-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-6-financial-results-financial-income-cost-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinanceCosts" xlink:label="ifrs-full_FinanceCosts" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinanceIncome" xlink:label="ifrs-full_FinanceIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinanceIncomeCost" xlink:label="ifrs-full_FinanceIncomeCost" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RevenueFromInterest" xlink:label="ifrs-full_RevenueFromInterest" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FinanceIncomeCostContinuingOperations" xlink:label="ts_FinanceIncomeCostContinuingOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FinanceIncomeCostDiscontinuedOperations" xlink:label="ts_FinanceIncomeCostDiscontinuedOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ForeignExchangeDerivativesContractsResults" xlink:label="ts_ForeignExchangeDerivativesContractsResults" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NetFinancialIncomeOnChangesInFVOfFinancialAssetsAtFVTPL" xlink:label="ts_NetFinancialIncomeOnChangesInFVOfFinancialAssetsAtFVTPL" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NetForeignExchangeTransactionResults" xlink:label="ts_NetForeignExchangeTransactionResults" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherFinancialIncomeCost" xlink:label="ts_OtherFinancialIncomeCost" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherForeignExchangeResults" xlink:label="ts_OtherForeignExchangeResults" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_RevenueFromInterest" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NetFinancialIncomeOnChangesInFVOfFinancialAssetsAtFVTPL" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_FinanceIncome" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_FinanceCosts" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NetForeignExchangeTransactionResults" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_ForeignExchangeDerivativesContractsResults" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherForeignExchangeResults" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_OtherFinancialIncomeCost" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_FinanceIncomeCostContinuingOperations" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_FinanceIncomeCostDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_FinanceIncomeCost" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-7-income-tax-summary-of-income-tax-expense-benefit-details" xlink:href="ts-20191231.xsd#statement-note-7-income-tax-summary-of-income-tax-expense-benefit-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-7-income-tax-summary-of-income-tax-expense-benefit-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentTaxExpenseIncome" xlink:label="ifrs-full_CurrentTaxExpenseIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxExpenseIncome" xlink:label="ifrs-full_DeferredTaxExpenseIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_IncomeTaxesAccrued" xlink:label="ts_IncomeTaxesAccrued" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxExpenseRelatingToProfitLossFromOrdinaryActivitiesAndDiscontinuanceOfDiscontinuedOperations" xlink:label="ts_TaxExpenseRelatingToProfitLossFromOrdinaryActivitiesAndDiscontinuanceOfDiscontinuedOperations" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentTaxExpenseIncome" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxExpenseIncome" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_IncomeTaxesAccrued" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_TaxExpenseRelatingToProfitLossFromOrdinaryActivitiesAndDiscontinuanceOfDiscontinuedOperations" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-7-income-tax-summary-of-differences-between-income-tax-and-theoretical-amount-using-tax-rate-in-each-country-details" xlink:href="ts-20191231.xsd#statement-note-7-income-tax-summary-of-differences-between-income-tax-and-theoretical-amount-using-tax-rate-in-each-country-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-7-income-tax-summary-of-differences-between-income-tax-and-theoretical-amount-using-tax-rate-in-each-country-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome" xlink:label="ifrs-full_IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="ifrs-full_ProfitLossBeforeTax" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TaxEffectFromChangeInTaxRate" xlink:label="ifrs-full_TaxEffectFromChangeInTaxRate" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TaxEffectOfTaxLosses" xlink:label="ifrs-full_TaxEffectOfTaxLosses" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TaxExpenseIncomeAtApplicableTaxRate" xlink:label="ifrs-full_TaxExpenseIncomeAtApplicableTaxRate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TaxEffectOfRevenuesExemptFromTaxationAndExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss" xlink:label="ts_TaxEffectOfRevenuesExemptFromTaxationAndExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProfitLossBeforeTax" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_TaxExpenseIncomeAtApplicableTaxRate" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_TaxEffectFromChangeInTaxRate" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_TaxEffectOfTaxLosses" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_TaxEffectOfRevenuesExemptFromTaxationAndExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-9-property-plant-and-equipment-net-components-of-property-plant-and-equipment-net-details" xlink:href="ts-20191231.xsd#statement-note-9-property-plant-and-equipment-net-components-of-property-plant-and-equipment-net-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-9-property-plant-and-equipment-net-components-of-property-plant-and-equipment-net-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember" xlink:label="ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:label="ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ConstructionInProgressMember" xlink:label="ifrs-full_ConstructionInProgressMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DepreciationPropertyPlantAndEquipment" xlink:label="ifrs-full_DepreciationPropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisposalsAndRetirementsPropertyPlantAndEquipment" xlink:label="ifrs-full_DisposalsAndRetirementsPropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossCarryingAmountMember" xlink:label="ifrs-full_GrossCarryingAmountMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment" xlink:label="ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="ifrs-full_PropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_IndustrialBuildingsPlantAndProductionEquipmentMember" xlink:label="ts_IndustrialBuildingsPlantAndProductionEquipmentMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LandAndCivilBuildingsMember" xlink:label="ts_LandAndCivilBuildingsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SparePartsAndEquipmentMember" xlink:label="ts_SparePartsAndEquipmentMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_VehiclesFurnitureAndFixturesMember" xlink:label="ts_VehiclesFurnitureAndFixturesMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_GrossCarryingAmountMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ts_LandAndCivilBuildingsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ts_IndustrialBuildingsPlantAndProductionEquipmentMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ts_VehiclesFurnitureAndFixturesMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ifrs-full_ConstructionInProgressMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ts_SparePartsAndEquipmentMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PropertyPlantAndEquipment" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisposalsAndRetirementsPropertyPlantAndEquipment" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DepreciationPropertyPlantAndEquipment" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-10-intangible-assets-net-intangible-assets-and-goodwill-details" xlink:href="ts-20191231.xsd#statement-note-10-intangible-assets-net-intangible-assets-and-goodwill-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-10-intangible-assets-net-intangible-assets-and-goodwill-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember" xlink:label="ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill" xlink:label="ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:label="ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:label="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:label="ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisposalsIntangibleAssetsAndGoodwill" xlink:label="ifrs-full_DisposalsIntangibleAssetsAndGoodwill" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GoodwillMember" xlink:label="ifrs-full_GoodwillMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossCarryingAmountMember" xlink:label="ifrs-full_GrossCarryingAmountMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesIntangibleAssetsAndGoodwill" xlink:label="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesIntangibleAssetsAndGoodwill" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwill" xlink:label="ifrs-full_IntangibleAssetsAndGoodwill" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsAndGoodwillMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_InformationSystemProjectsMember" xlink:label="ts_InformationSystemProjectsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_LicensesPatentsAndTrademarksMember" xlink:label="ts_LicensesPatentsAndTrademarksMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_GrossCarryingAmountMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ts_InformationSystemProjectsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsAndGoodwillMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ts_LicensesPatentsAndTrademarksMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ifrs-full_GoodwillMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IntangibleAssetsAndGoodwill" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesIntangibleAssetsAndGoodwill" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DisposalsIntangibleAssetsAndGoodwill" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-10-intangible-assets-net-goodwill-allocated-by-cgu-details" xlink:href="ts-20191231.xsd#statement-note-10-intangible-assets-net-goodwill-allocated-by-cgu-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-10-intangible-assets-net-goodwill-allocated-by-cgu-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AllOtherSegmentsMember" xlink:label="ifrs-full_AllOtherSegmentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:label="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:label="ifrs-full_EntitysTotalForCashgeneratingUnitsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Goodwill" xlink:label="ifrs-full_Goodwill" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:label="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsAxis" xlink:label="ifrs-full_SegmentsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CoiledTubingMember" xlink:label="ts_CoiledTubingMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:label="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_HydrilMember" xlink:label="ts_HydrilMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_HydrillAcquisitionMember" xlink:label="ts_HydrillAcquisitionMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_MaverickAcquisitionMember" xlink:label="ts_MaverickAcquisitionMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OCTGUSAMember" xlink:label="ts_OCTGUSAMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_OtherCguMember" xlink:label="ts_OtherCguMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_SidercaHydrilAndOtherMember" xlink:label="ts_SidercaHydrilAndOtherMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TamsaHydrilAndOtherMember" xlink:label="ts_TamsaHydrilAndOtherMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_TubesMember" xlink:label="ts_TubesMember" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:to="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_SegmentsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="ts_TubesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_MaverickAcquisitionMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember-default" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:to="ts_OCTGUSAMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:to="ifrs-full_EntitysTotalForCashgeneratingUnitsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ts_HydrillAcquisitionMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="ifrs-full_AllOtherSegmentsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:to="ts_TamsaHydrilAndOtherMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:to="ts_SidercaHydrilAndOtherMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:to="ts_HydrilMember" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:to="ts_ConfabIndustrialSaAndSubsidiariesMember" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:to="ts_CoiledTubingMember" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:to="ts_OtherCguMember" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Goodwill" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-17-trade-receivables-net-summary-of-the-aging-of-trade-receivables-details" xlink:href="ts-20191231.xsd#statement-note-17-trade-receivables-net-summary-of-the-aging-of-trade-receivables-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-17-trade-receivables-net-summary-of-the-aging-of-trade-receivables-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentTradeReceivables" xlink:label="ifrs-full_CurrentTradeReceivables" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AllowanceForDoubfulAccountsNetOfNominativeAllowances" xlink:label="ts_AllowanceForDoubfulAccountsNetOfNominativeAllowances" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentTradeReceivablesExpectedLossRate" xlink:label="ts_CurrentTradeReceivablesExpectedLossRate" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentTradeReceivablesGross" xlink:label="ts_CurrentTradeReceivablesGross" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentTradeReceivablesGuaranteed" xlink:label="ts_CurrentTradeReceivablesGuaranteed" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentTradeReceivablesNominativeAllowancesForDoubtfulAccounts" xlink:label="ts_CurrentTradeReceivablesNominativeAllowancesForDoubtfulAccounts" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentTradeReceivablesNotDueMember" xlink:label="ts_CurrentTradeReceivablesNotDueMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentTradeReceivablesNotGuaranteed" xlink:label="ts_CurrentTradeReceivablesNotGuaranteed" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentTradeReceivablesPastDueGreaterThan180DaysMember" xlink:label="ts_CurrentTradeReceivablesPastDueGreaterThan180DaysMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentTradeReceivablesPastDueLessThan180DaysMember" xlink:label="ts_CurrentTradeReceivablesPastDueLessThan180DaysMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_CurrentTradeReceivablesNotDueMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_CurrentTradeReceivablesPastDueLessThan180DaysMember" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ts_CurrentTradeReceivablesPastDueGreaterThan180DaysMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentTradeReceivablesGuaranteed" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentTradeReceivablesNotGuaranteed" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentTradeReceivablesGross" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentTradeReceivablesExpectedLossRate" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_AllowanceForDoubfulAccountsNetOfNominativeAllowances" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentTradeReceivablesNominativeAllowancesForDoubtfulAccounts" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentTradeReceivables" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-noncurrent-and-current-borrowings-details" xlink:href="ts-20191231.xsd#statement-note-19-borrowings-noncurrent-and-current-borrowings-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-19-borrowings-noncurrent-and-current-borrowings-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Borrowings" xlink:label="ifrs-full_Borrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:label="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LongtermBorrowings" xlink:label="ifrs-full_LongtermBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_BankBorrowingsMember" xlink:label="ts_BankBorrowingsMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_BankOverdrafts1Member" xlink:label="ts_BankOverdrafts1Member" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentBorrowingsBeforeCostsOfIssueOfDebt" xlink:label="ts_CurrentBorrowingsBeforeCostsOfIssueOfDebt" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_CurrentCostsOfIssueOfDebt" xlink:label="ts_CurrentCostsOfIssueOfDebt" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FinanceLeaseLiabilitiesMember" xlink:label="ts_FinanceLeaseLiabilitiesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NoncurrentBorrowingsBeforeCostsOfIssueOfDebt" xlink:label="ts_NoncurrentBorrowingsBeforeCostsOfIssueOfDebt" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NoncurrentCostsOfIssueOfDebt" xlink:label="ts_NoncurrentCostsOfIssueOfDebt" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_BorrowingsByNameAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="ts_BankBorrowingsMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="ts_BankOverdrafts1Member" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="ts_FinanceLeaseLiabilitiesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NoncurrentBorrowingsBeforeCostsOfIssueOfDebt" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_NoncurrentCostsOfIssueOfDebt" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_LongtermBorrowings" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentBorrowingsBeforeCostsOfIssueOfDebt" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_CurrentCostsOfIssueOfDebt" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Borrowings" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-22-noncurrent-allowances-and-provisions-deducted-from-noncurrent-receivables-details" xlink:href="ts-20191231.xsd#statement-note-22-noncurrent-allowances-and-provisions-deducted-from-noncurrent-receivables-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-22-noncurrent-allowances-and-provisions-deducted-from-noncurrent-receivables-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ifrs-full_ClassesOfProvisionsAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisions" xlink:label="ifrs-full_OtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProvisionUsedOtherProvisions" xlink:label="ifrs-full_ProvisionUsedOtherProvisions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_NoncurrentAllowanceForReceivablesMember" xlink:label="ts_NoncurrentAllowanceForReceivablesMember" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_ClassesOfProvisionsAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="ts_NoncurrentAllowanceForReceivablesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_ProvisionUsedOtherProvisions" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-note-30-related-party-transactions-transactions-carried-out-with-related-parties-details" xlink:href="ts-20191231.xsd#statement-note-30-related-party-transactions-transactions-carried-out-with-related-parties-details" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-note-30-related-party-transactions-transactions-carried-out-with-related-parties-details" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AmountsPayableRelatedPartyTransactions" xlink:label="ifrs-full_AmountsPayableRelatedPartyTransactions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AmountsReceivableRelatedPartyTransactions" xlink:label="ifrs-full_AmountsReceivableRelatedPartyTransactions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AssociatesMember" xlink:label="ifrs-full_AssociatesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember-default" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherRelatedPartiesMember" xlink:label="ifrs-full_OtherRelatedPartiesMember" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PurchasesOfGoodsRelatedPartyTransactions" xlink:label="ifrs-full_PurchasesOfGoodsRelatedPartyTransactions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PurchasesOfPropertyAndOtherAssetsRelatedPartyTransactions" xlink:label="ifrs-full_PurchasesOfPropertyAndOtherAssetsRelatedPartyTransactions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions" xlink:label="ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RevenueFromSaleOfGoodsRelatedPartyTransactions" xlink:label="ifrs-full_RevenueFromSaleOfGoodsRelatedPartyTransactions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_AmountsReceivablePayableRelatedPartyTransactions" xlink:label="ts_AmountsReceivablePayableRelatedPartyTransactions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FinanceLeaseLiabilitiesFromNonconsolidatedParties" xlink:label="ts_FinanceLeaseLiabilitiesFromNonconsolidatedParties" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_FinancialDebtRelatedParties" xlink:label="ts_FinancialDebtRelatedParties" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_PurchasesOfGoodsAndServicesRelatedPartyTransactions" xlink:label="ts_PurchasesOfGoodsAndServicesRelatedPartyTransactions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_RevenueRelatedPartyTransactions" xlink:label="ts_RevenueRelatedPartyTransactions" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="ifrs-full_AssociatesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember-default" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="ifrs-full_OtherRelatedPartiesMember" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_RevenueFromSaleOfGoodsRelatedPartyTransactions" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_RevenueRelatedPartyTransactions" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PurchasesOfGoodsRelatedPartyTransactions" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PurchasesOfPropertyAndOtherAssetsRelatedPartyTransactions" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_PurchasesOfGoodsAndServicesRelatedPartyTransactions" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AmountsReceivableRelatedPartyTransactions" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_AmountsPayableRelatedPartyTransactions" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_AmountsReceivablePayableRelatedPartyTransactions" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_FinanceLeaseLiabilitiesFromNonconsolidatedParties" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ts_FinancialDebtRelatedParties" xlink:type="arc"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://us.tenaris.com/20191231/role/statement-consolidated-statement-of-financial-position" xlink:href="ts-20191231.xsd#statement-consolidated-statement-of-financial-position" xlink:type="simple"/>
  <link:definitionLink xlink:role="http://us.tenaris.com/20191231/role/statement-consolidated-statement-of-financial-position" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain-default" xlink:type="locator"/>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Assets" xlink:label="ifrs-full_Assets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentAdvances" xlink:label="ifrs-full_CurrentAdvances" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentAssets" xlink:label="ifrs-full_CurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:label="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentDerivativeFinancialAssets" xlink:label="ifrs-full_CurrentDerivativeFinancialAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentDerivativeFinancialLiabilities" xlink:label="ifrs-full_CurrentDerivativeFinancialLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentInvestments" xlink:label="ifrs-full_CurrentInvestments" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentLeaseLiabilities" xlink:label="ifrs-full_CurrentLeaseLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentLiabilities" xlink:label="ifrs-full_CurrentLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets" xlink:label="ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentProvisions" xlink:label="ifrs-full_CurrentProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentTaxAssetsCurrent" xlink:label="ifrs-full_CurrentTaxAssetsCurrent" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:label="ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentTradeReceivables" xlink:label="ifrs-full_CurrentTradeReceivables" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxAssets" xlink:label="ifrs-full_DeferredTaxAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxLiabilities" xlink:label="ifrs-full_DeferredTaxLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityAndLiabilities" xlink:label="ifrs-full_EquityAndLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParent" xlink:label="ifrs-full_EquityAttributableToOwnersOfParent" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwill" xlink:label="ifrs-full_IntangibleAssetsAndGoodwill" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Inventories" xlink:label="ifrs-full_Inventories" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:label="ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Liabilities" xlink:label="ifrs-full_Liabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LongtermBorrowings" xlink:label="ifrs-full_LongtermBorrowings" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncontrollingInterests" xlink:label="ifrs-full_NoncontrollingInterests" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentAssets" xlink:label="ifrs-full_NoncurrentAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod" xlink:label="ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentLeaseLiabilities" xlink:label="ifrs-full_NoncurrentLeaseLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentLiabilities" xlink:label="ifrs-full_NoncurrentLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentProvisions" xlink:label="ifrs-full_NoncurrentProvisions" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentReceivables" xlink:label="ifrs-full_NoncurrentReceivables" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherCurrentLiabilities" xlink:label="ifrs-full_OtherCurrentLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherNoncurrentLiabilities" xlink:label="ifrs-full_OtherNoncurrentLiabilities" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="ifrs-full_PropertyPlantAndEquipment" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RightofuseAssets" xlink:label="ifrs-full_RightofuseAssets" xlink:type="locator"/>
    <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeAndOtherCurrentPayables" xlink:label="ifrs-full_TradeAndOtherCurrentPayables" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementLineItems" xlink:label="ts_StatementLineItems" xlink:type="locator"/>
    <link:loc xlink:href="ts-20191231.xsd#ts_StatementTable" xlink:label="ts_StatementTable" xlink:type="locator"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ts_StatementTable" xlink:to="dei_LegalEntityAxis" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain-default" xlink:type="arc"/>
    <link:definitionArc order="0" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ts_StatementLineItems" xlink:to="ts_StatementTable" xlink:type="arc"/>
    <link:definitionArc order="1" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_PropertyPlantAndEquipment" xlink:type="arc"/>
    <link:definitionArc order="2" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_IntangibleAssetsAndGoodwill" xlink:type="arc"/>
    <link:definitionArc order="3" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_RightofuseAssets" xlink:type="arc"/>
    <link:definitionArc order="4" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates" xlink:type="arc"/>
    <link:definitionArc order="5" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod" xlink:type="arc"/>
    <link:definitionArc order="6" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxAssets" xlink:type="arc"/>
    <link:definitionArc order="7" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentReceivables" xlink:type="arc"/>
    <link:definitionArc order="8" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentAssets" xlink:type="arc"/>
    <link:definitionArc order="9" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Inventories" xlink:type="arc"/>
    <link:definitionArc order="10" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets" xlink:type="arc"/>
    <link:definitionArc order="11" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentTaxAssetsCurrent" xlink:type="arc"/>
    <link:definitionArc order="12" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentTradeReceivables" xlink:type="arc"/>
    <link:definitionArc order="13" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentDerivativeFinancialAssets" xlink:type="arc"/>
    <link:definitionArc order="14" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentInvestments" xlink:type="arc"/>
    <link:definitionArc order="15" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CashAndCashEquivalents" xlink:type="arc"/>
    <link:definitionArc order="16" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentAssets" xlink:type="arc"/>
    <link:definitionArc order="17" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Assets" xlink:type="arc"/>
    <link:definitionArc order="18" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_EquityAttributableToOwnersOfParent" xlink:type="arc"/>
    <link:definitionArc order="19" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncontrollingInterests" xlink:type="arc"/>
    <link:definitionArc order="20" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Equity" xlink:type="arc"/>
    <link:definitionArc order="21" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_LongtermBorrowings" xlink:type="arc"/>
    <link:definitionArc order="22" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentLeaseLiabilities" xlink:type="arc"/>
    <link:definitionArc order="23" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_DeferredTaxLiabilities" xlink:type="arc"/>
    <link:definitionArc order="24" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherNoncurrentLiabilities" xlink:type="arc"/>
    <link:definitionArc order="25" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentProvisions" xlink:type="arc"/>
    <link:definitionArc order="26" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_NoncurrentLiabilities" xlink:type="arc"/>
    <link:definitionArc order="27" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="arc"/>
    <link:definitionArc order="28" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentLeaseLiabilities" xlink:type="arc"/>
    <link:definitionArc order="29" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentDerivativeFinancialLiabilities" xlink:type="arc"/>
    <link:definitionArc order="30" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:type="arc"/>
    <link:definitionArc order="31" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_OtherCurrentLiabilities" xlink:type="arc"/>
    <link:definitionArc order="32" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentProvisions" xlink:type="arc"/>
    <link:definitionArc order="33" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentAdvances" xlink:type="arc"/>
    <link:definitionArc order="34" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_TradeAndOtherCurrentPayables" xlink:type="arc"/>
    <link:definitionArc order="35" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_CurrentLiabilities" xlink:type="arc"/>
    <link:definitionArc order="36" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_Liabilities" xlink:type="arc"/>
    <link:definitionArc order="37" xbrldt:closed="true" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ts_StatementLineItems" xlink:to="ifrs-full_EquityAndLiabilities" xlink:type="arc"/>
  </link:definitionLink>
</link:linkbase>
