<?xml version="1.0" encoding="utf-8"?>
<?taxonomy-generator id="PomdocPro" version="2021.1.1.1" date="2025-04-28 10:54:30"?>
<linkbase 
  xmlns="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xbrldt="http://xbrl.org/2005/xbrldt"
  xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"
>
  <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"
  />
  <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"
  />
  <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"
  />
  <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"
  />
  <arcroleRef
    arcroleURI="http://xbrl.org/int/dim/arcrole/all"
    xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"
    xlink:type="simple"
  />
  <arcroleRef
    arcroleURI="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower"
    xlink:href="http://www.xbrl.org/lrr/arcrole/esma-arcrole-2018-11-21.xsd#wider-narrower"
    xlink:type="simple"
  />
  <roleRef
    roleURI="https://www.gtt.fr/role/Anchoring"
    xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#Anchoring"
    xlink:type="simple"
  />
  <roleRef
    roleURI="https://www.gtt.fr/role/StatementOfChangesInEquity"
    xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#StatementOfChangesInEquity"
    xlink:type="simple"
  />
  <roleRef
    roleURI="https://www.esma.europa.eu/xbrl/role/cor/esef_role-999999"
    xlink:href="https://www.esma.europa.eu/taxonomy/2022-03-24/esef_cor.xsd#esef_role-999999"
    xlink:type="simple"
  />
  <definitionLink xlink:role="https://www.gtt.fr/role/Anchoring" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="ifrs-full_NoncurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentAssets"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_PropertyPlantAndEquipment" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PropertyPlantAndEquipment"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_RightofuseAssetsThatDoNotMeetDefinitionOfInvestmentProperty" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RightofuseAssetsThatDoNotMeetDefinitionOfInvestmentProperty"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_EquityAttributableToOwnersOfParent" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAttributableToOwnersOfParent"/>
    <loc xlink:type="locator" xlink:label="Reserves" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_Reserves"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="Reserves" xlink:from="ifrs-full_EquityAttributableToOwnersOfParent" order="4.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_RetainedEarningsExcludingProfitLossForReportingPeriod" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RetainedEarningsExcludingProfitLossForReportingPeriod"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="ifrs-full_RetainedEarningsExcludingProfitLossForReportingPeriod" xlink:from="Reserves" order="5.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AccumulatedOtherComprehensiveIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AccumulatedOtherComprehensiveIncome"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="ifrs-full_AccumulatedOtherComprehensiveIncome" xlink:from="Reserves" order="6.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_OperatingExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OperatingExpense"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ProfitLossFromOperatingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossFromOperatingActivities"/>
    <loc xlink:type="locator" xlink:label="AutresProduitsEtChargesOperationnels" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_AutresProduitsEtChargesOperationnels"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="AutresProduitsEtChargesOperationnels" xlink:from="ifrs-full_ProfitLossFromOperatingActivities" order="9.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_MiscellaneousOtherOperatingExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_MiscellaneousOtherOperatingExpense"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="ifrs-full_MiscellaneousOtherOperatingExpense" xlink:from="AutresProduitsEtChargesOperationnels" order="11.0"/>
    <loc xlink:type="locator" xlink:label="OtherNoncurrentIncomeAndExpenses" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_OtherNoncurrentIncomeAndExpenses"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="OtherNoncurrentIncomeAndExpenses" xlink:from="ifrs-full_ProfitLossFromOperatingActivities" order="12.0"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="ifrs-full_MiscellaneousOtherOperatingExpense" xlink:from="OtherNoncurrentIncomeAndExpenses" order="14.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsForReconcileProfitLoss" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForReconcileProfitLoss"/>
    <loc xlink:type="locator" xlink:label="AmortissementsProvisionsDepreciations" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_AmortissementsProvisionsDepreciations"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="AmortissementsProvisionsDepreciations" xlink:from="ifrs-full_AdjustmentsForReconcileProfitLoss" order="15.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsForProvisions" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForProvisions"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="ifrs-full_AdjustmentsForProvisions" xlink:from="AmortissementsProvisionsDepreciations" order="16.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:from="AmortissementsProvisionsDepreciations" order="17.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"/>
    <loc xlink:type="locator" xlink:label="ActionsAutoDetenues" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_ActionsAutoDetenues"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="ActionsAutoDetenues" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" order="18.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities"/>
    <loc xlink:type="locator" xlink:label="InteretsRecus" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_InteretsRecus"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="InteretsRecus" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" order="19.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory"/>
    <loc xlink:type="locator" xlink:label="DIsclosureOfOtherOperatingIncomeAndExpensesExplanatory" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_DIsclosureOfOtherOperatingIncomeAndExpensesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="DIsclosureOfOtherOperatingIncomeAndExpensesExplanatory" xlink:from="ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory" order="20.0"/>
    <loc xlink:type="locator" xlink:label="DIsclosureOfOtherNoncurrentIncomeAndExpensesExplanatory" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_DIsclosureOfOtherNoncurrentIncomeAndExpensesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="DIsclosureOfOtherNoncurrentIncomeAndExpensesExplanatory" xlink:from="ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory" order="21.0"/>
    <loc xlink:type="locator" xlink:label="TangibleAssetsIncludingRightsOfUse" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_TangibleAssetsIncludingRightsOfUse"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="TangibleAssetsIncludingRightsOfUse" xlink:from="ifrs-full_NoncurrentAssets" order="22.0"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="ifrs-full_PropertyPlantAndEquipment" xlink:from="TangibleAssetsIncludingRightsOfUse" order="23.0"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="ifrs-full_RightofuseAssetsThatDoNotMeetDefinitionOfInvestmentProperty" xlink:from="TangibleAssetsIncludingRightsOfUse" order="24.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_MiscellaneousOtherOperatingIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_MiscellaneousOtherOperatingIncome"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="ifrs-full_MiscellaneousOtherOperatingIncome" xlink:from="AutresProduitsEtChargesOperationnels" order="27.0"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="ifrs-full_MiscellaneousOtherOperatingIncome" xlink:from="OtherNoncurrentIncomeAndExpenses" order="28.0"/>
    <loc xlink:type="locator" xlink:label="DotationsAuxAmortissementsEtProvisions" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_DotationsAuxAmortissementsEtProvisions"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="DotationsAuxAmortissementsEtProvisions" xlink:from="ifrs-full_OperatingExpense" order="29.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DepreciationAndAmortisationExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DepreciationAndAmortisationExpense"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:to="ifrs-full_DepreciationAndAmortisationExpense" xlink:from="DotationsAuxAmortissementsEtProvisions" order="30.0"/>
  </definitionLink>
  <definitionLink xlink:role="https://www.gtt.fr/role/StatementOfChangesInEquity" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="ifrs-full_StatementOfChangesInEquityAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfChangesInEquityAbstract"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_StatementOfChangesInEquityTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfChangesInEquityTable"/>
    <definitionArc xbrldt:closed="true" xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="scenario" xlink:to="ifrs-full_StatementOfChangesInEquityTable" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" order="1.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ComponentsOfEquityAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:to="ifrs-full_ComponentsOfEquityAxis" xlink:from="ifrs-full_StatementOfChangesInEquityTable" order="2.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_EquityMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:to="ifrs-full_EquityMember" xlink:from="ifrs-full_ComponentsOfEquityAxis" order="3.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAttributableToOwnersOfParentMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:from="ifrs-full_EquityMember" order="4.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_NoncontrollingInterestsMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncontrollingInterestsMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_NoncontrollingInterestsMember" xlink:from="ifrs-full_EquityMember" order="5.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IssuedCapitalMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssuedCapitalMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IssuedCapitalMember" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" order="6.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_SharePremiumMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_SharePremiumMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_SharePremiumMember" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" order="7.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_TreasurySharesMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TreasurySharesMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_TreasurySharesMember" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" order="8.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_RetainedEarningsExcludingProfitLossForReportingPeriodMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RetainedEarningsExcludingProfitLossForReportingPeriodMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_RetainedEarningsExcludingProfitLossForReportingPeriodMember" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" order="9.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_RetainedEarningsProfitLossForReportingPeriodMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RetainedEarningsProfitLossForReportingPeriodMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_RetainedEarningsProfitLossForReportingPeriodMember" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" order="10.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" order="11.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_Equity" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Equity"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_Equity" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" order="12.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ProfitLoss" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLoss"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ProfitLoss" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" order="13.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_OtherComprehensiveIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherComprehensiveIncome"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_OtherComprehensiveIncome" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" order="14.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" order="15.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" order="16.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IncreaseDecreaseThroughExerciseOfOptions" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughExerciseOfOptions"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IncreaseDecreaseThroughExerciseOfOptions" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" order="17.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" order="18.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DividendsPaid" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DividendsPaid"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DividendsPaid" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" order="19.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" order="20.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" order="21.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IssueOfEquity" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssueOfEquity"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IssueOfEquity" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" order="22.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" order="23.0"/>
  </definitionLink>
  <definitionLink xlink:role="https://www.esma.europa.eu/xbrl/role/cor/esef_role-999999" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:href="https://www.esma.europa.eu/taxonomy/2022-03-24/esef_cor.xsd#esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder"/>
    <loc xlink:type="locator" xlink:label="esef_cor_LineItemsNotDimensionallyQualified" xlink:href="https://www.esma.europa.eu/taxonomy/2022-03-24/esef_cor.xsd#esef_cor_LineItemsNotDimensionallyQualified"/>
    <definitionArc xbrldt:closed="true" xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="scenario" xlink:to="esef_cor_LineItemsNotDimensionallyQualified" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="1.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="2.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfEmployeeBenefitsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfEmployeeBenefitsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfEmployeeBenefitsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="3.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="4.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="5.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForGoodwillExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForGoodwillExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForGoodwillExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="6.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="7.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfIssuedCapitalExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfIssuedCapitalExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfIssuedCapitalExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="8.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfFinanceCostExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinanceCostExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfFinanceCostExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="9.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfBusinessCombinationsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfBusinessCombinationsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfBusinessCombinationsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="10.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="11.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfLeasesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfLeasesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfLeasesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="12.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfGovernmentGrantsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfGovernmentGrantsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfGovernmentGrantsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="13.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfFairValueOfFinancialInstrumentsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFairValueOfFinancialInstrumentsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfFairValueOfFinancialInstrumentsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="14.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="15.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfAccountingJudgementsAndEstimatesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfAccountingJudgementsAndEstimatesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfAccountingJudgementsAndEstimatesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="16.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="17.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="18.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForEarningsPerShareExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForEarningsPerShareExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForEarningsPerShareExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="19.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="20.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfDividendsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDividendsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfDividendsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="21.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="22.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="23.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForBusinessCombinationsAndGoodwillExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForBusinessCombinationsAndGoodwillExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForBusinessCombinationsAndGoodwillExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="24.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfChangesInAccountingPoliciesAccountingEstimatesAndErrorsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfChangesInAccountingPoliciesAccountingEstimatesAndErrorsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfChangesInAccountingPoliciesAccountingEstimatesAndErrorsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="25.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsAndGoodwillExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfIntangibleAssetsAndGoodwillExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfIntangibleAssetsAndGoodwillExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="26.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="27.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfOtherOperatingIncomeExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherOperatingIncomeExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfOtherOperatingIncomeExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="28.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="29.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="30.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="31.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfDepreciationAndAmortisationExpenseExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDepreciationAndAmortisationExpenseExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfDepreciationAndAmortisationExpenseExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="32.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFairValueMeasurementExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfFairValueMeasurementExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="33.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="34.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="35.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="36.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="37.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfIntangibleAssetsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfIntangibleAssetsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="38.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfOtherAssetsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherAssetsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfOtherAssetsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="39.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="40.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfProvisionsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfProvisionsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfProvisionsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="41.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="42.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="43.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfIncomeTaxExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="44.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfFinancialRiskManagementExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinancialRiskManagementExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfFinancialRiskManagementExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="45.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfRelatedPartyExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="46.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="47.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="48.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfOtherLiabilitiesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherLiabilitiesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfOtherLiabilitiesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="49.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfGoodwillExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfGoodwillExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfGoodwillExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="50.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfInventoriesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInventoriesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfInventoriesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="51.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="52.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinancialInstrumentsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="53.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfCreditRiskExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfCreditRiskExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfCreditRiskExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="54.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDeferredTaxesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="55.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfCommitmentsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfCommitmentsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfCommitmentsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="56.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="57.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForDepreciationExpenseExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForDepreciationExpenseExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForDepreciationExpenseExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="58.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="59.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="60.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="61.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="62.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="63.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfMarketRiskExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfMarketRiskExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfMarketRiskExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="64.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="65.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfResearchAndDevelopmentExpenseExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfResearchAndDevelopmentExpenseExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfResearchAndDevelopmentExpenseExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="66.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="67.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="68.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="69.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="70.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="71.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfLiquidityRiskExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfLiquidityRiskExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfLiquidityRiskExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="72.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="73.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfAuditorsRemunerationExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfAuditorsRemunerationExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfAuditorsRemunerationExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="74.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForContingentLiabilitiesAndContingentAssetsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForContingentLiabilitiesAndContingentAssetsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForContingentLiabilitiesAndContingentAssetsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="75.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfRevenueExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfRevenueExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfRevenueExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="76.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_StatementOfIFRSCompliance" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfIFRSCompliance"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_StatementOfIFRSCompliance" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="77.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfTreasurySharesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfTreasurySharesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfTreasurySharesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="78.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="79.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIssuedCapitalExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForIssuedCapitalExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForIssuedCapitalExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="80.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfContingentLiabilitiesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfContingentLiabilitiesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfContingentLiabilitiesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="81.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="82.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfFinanceIncomeExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinanceIncomeExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfFinanceIncomeExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="83.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfEarningsPerShareExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfEarningsPerShareExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfEarningsPerShareExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="84.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="85.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="86.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="87.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="88.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="89.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="90.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="91.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfAdditionalInformationExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfAdditionalInformationExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfAdditionalInformationExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="92.0"/>
    <loc xlink:type="locator" xlink:label="DIsclosureOfOtherOperatingIncomeAndExpensesExplanatory" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_DIsclosureOfOtherOperatingIncomeAndExpensesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="DIsclosureOfOtherOperatingIncomeAndExpensesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="93.0"/>
    <loc xlink:type="locator" xlink:label="DIsclosureOfOtherNoncurrentIncomeAndExpensesExplanatory" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_DIsclosureOfOtherNoncurrentIncomeAndExpensesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="DIsclosureOfOtherNoncurrentIncomeAndExpensesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="94.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="95.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="96.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="97.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfTaxReceivablesAndPayablesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfTaxReceivablesAndPayablesExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfTaxReceivablesAndPayablesExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="98.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfCashFlowStatementExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfCashFlowStatementExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfCashFlowStatementExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="99.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_RevenueFromContractsWithCustomers" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RevenueFromContractsWithCustomers"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_RevenueFromContractsWithCustomers" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="100.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_RevenueAndOperatingIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RevenueAndOperatingIncome"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_RevenueAndOperatingIncome" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="102.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_RawMaterialsAndConsumablesUsed" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RawMaterialsAndConsumablesUsed"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_RawMaterialsAndConsumablesUsed" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="103.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ServicesExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ServicesExpense"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ServicesExpense" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="104.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_EmployeeBenefitsExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EmployeeBenefitsExpense"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_EmployeeBenefitsExpense" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="105.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_TaxExpenseOtherThanIncomeTaxExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TaxExpenseOtherThanIncomeTaxExpense"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_TaxExpenseOtherThanIncomeTaxExpense" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="106.0"/>
    <loc xlink:type="locator" xlink:label="AutresProduitsEtChargesOperationnels" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_AutresProduitsEtChargesOperationnels"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="AutresProduitsEtChargesOperationnels" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="108.0"/>
    <loc xlink:type="locator" xlink:label="RecurringOperatingIncome" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_RecurringOperatingIncome"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="RecurringOperatingIncome" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="109.0"/>
    <loc xlink:type="locator" xlink:label="OtherNoncurrentIncomeAndExpenses" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_OtherNoncurrentIncomeAndExpenses"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="OtherNoncurrentIncomeAndExpenses" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="110.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ProfitLossFromOperatingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossFromOperatingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ProfitLossFromOperatingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="111.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_FinanceIncomeCost" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinanceIncomeCost"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_FinanceIncomeCost" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="112.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="113.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ProfitLossBeforeTax" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossBeforeTax"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ProfitLossBeforeTax" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="114.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="115.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="116.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossAttributableToNoncontrollingInterests"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="117.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_BasicEarningsLossPerShare" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_BasicEarningsLossPerShare"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_BasicEarningsLossPerShare" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="118.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DilutedEarningsLossPerShare" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DilutedEarningsLossPerShare"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DilutedEarningsLossPerShare" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="119.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_WeightedAverageShares" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_WeightedAverageShares"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_WeightedAverageShares" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="120.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustedWeightedAverageShares" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustedWeightedAverageShares"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_AdjustedWeightedAverageShares" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="121.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="122.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="123.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="124.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="125.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ComprehensiveIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComprehensiveIncome"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ComprehensiveIncome" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="126.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="127.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_Goodwill" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Goodwill"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_Goodwill" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="128.0"/>
    <loc xlink:type="locator" xlink:label="TangibleAssetsIncludingRightsOfUse" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_TangibleAssetsIncludingRightsOfUse"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="TangibleAssetsIncludingRightsOfUse" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="129.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_InvestmentAccountedForUsingEquityMethod" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InvestmentAccountedForUsingEquityMethod"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_InvestmentAccountedForUsingEquityMethod" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="130.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_NoncurrentFinancialAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentFinancialAssets"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_NoncurrentFinancialAssets" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="131.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DeferredTaxAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DeferredTaxAssets"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DeferredTaxAssets" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="132.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_NoncurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentAssets"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_NoncurrentAssets" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="133.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_InventoriesTotal" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InventoriesTotal"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_InventoriesTotal" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="134.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CurrentTradeReceivables" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentTradeReceivables"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CurrentTradeReceivables" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="135.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CurrentTaxAssetsCurrent" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentTaxAssetsCurrent"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CurrentTaxAssetsCurrent" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="136.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_OtherCurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherCurrentAssets"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_OtherCurrentAssets" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="137.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CurrentFinancialAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentFinancialAssets"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CurrentFinancialAssets" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="138.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CashAndCashEquivalents" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashAndCashEquivalents"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CashAndCashEquivalents" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="139.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentAssets"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CurrentAssets" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="140.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_Assets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Assets"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_Assets" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="141.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IssuedCapital" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssuedCapital"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IssuedCapital" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="142.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_SharePremium" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_SharePremium"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_SharePremium" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="143.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_TreasuryShares" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TreasuryShares"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_TreasuryShares" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="144.0"/>
    <loc xlink:type="locator" xlink:label="Reserves" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_Reserves"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="Reserves" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="145.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_RetainedEarningsProfitLossForReportingPeriod" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RetainedEarningsProfitLossForReportingPeriod"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_RetainedEarningsProfitLossForReportingPeriod" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="146.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_EquityAttributableToOwnersOfParent" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAttributableToOwnersOfParent"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_EquityAttributableToOwnersOfParent" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="147.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_NoncontrollingInterests" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncontrollingInterests"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_NoncontrollingInterests" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="148.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_NoncurrentProvisions" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentProvisions"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_NoncurrentProvisions" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="149.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_NoncurrentFinancialLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentFinancialLiabilities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_NoncurrentFinancialLiabilities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="150.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DeferredTaxLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DeferredTaxLiabilities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DeferredTaxLiabilities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="151.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_NoncurrentLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentLiabilities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_NoncurrentLiabilities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="152.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CurrentProvisions" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentProvisions"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CurrentProvisions" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="153.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_TradeAndOtherCurrentPayables" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TradeAndOtherCurrentPayables"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_TradeAndOtherCurrentPayables" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="154.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CurrentGovernmentGrants" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentGovernmentGrants"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CurrentGovernmentGrants" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="155.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentTaxLiabilitiesCurrent"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="156.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CurrentFinancialLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentFinancialLiabilities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CurrentFinancialLiabilities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="157.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_OtherCurrentLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherCurrentLiabilities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_OtherCurrentLiabilities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="158.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CurrentLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentLiabilities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CurrentLiabilities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="159.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_EquityAndLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAndLiabilities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_EquityAndLiabilities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="160.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="161.0"/>
    <loc xlink:type="locator" xlink:label="AmortissementsProvisionsDepreciations" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_AmortissementsProvisionsDepreciations"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="AmortissementsProvisionsDepreciations" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="162.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="163.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsForFinanceIncomeCost" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForFinanceIncomeCost"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_AdjustmentsForFinanceIncomeCost" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="164.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForIncomeTaxExpense"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="165.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsForSharebasedPayments" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForSharebasedPayments"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_AdjustmentsForSharebasedPayments" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="166.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="167.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="168.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="169.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInInventories"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="170.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="171.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="172.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherOperatingPayables" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInOtherOperatingPayables"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherOperatingPayables" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="173.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="174.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="175.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ProceedsFromGovernmentGrantsClassifiedAsInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromGovernmentGrantsClassifiedAsInvestingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ProceedsFromGovernmentGrantsClassifiedAsInvestingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="176.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="177.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="178.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="179.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_PurchaseOfInterestsInInvestmentsAccountedForUsingEquityMethod" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PurchaseOfInterestsInInvestmentsAccountedForUsingEquityMethod"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_PurchaseOfInterestsInInvestmentsAccountedForUsingEquityMethod" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="180.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="181.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="182.0"/>
    <loc xlink:type="locator" xlink:label="ActionsAutoDetenues" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_ActionsAutoDetenues"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ActionsAutoDetenues" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="183.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="184.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="185.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DividendsPaidClassifiedAsFinancingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="186.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ProceedsFromIssuingShares" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromIssuingShares"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ProceedsFromIssuingShares" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="187.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="188.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="189.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_InterestPaidClassifiedAsFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InterestPaidClassifiedAsFinancingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_InterestPaidClassifiedAsFinancingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="190.0"/>
    <loc xlink:type="locator" xlink:label="InteretsRecus" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_InteretsRecus"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="InteretsRecus" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="191.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="192.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="193.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="194.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="195.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_NumberOfSharesOutstanding" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NumberOfSharesOutstanding"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_NumberOfSharesOutstanding" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="196.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="197.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="198.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_AddressOfRegisteredOfficeOfEntity" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AddressOfRegisteredOfficeOfEntity"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_AddressOfRegisteredOfficeOfEntity" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="199.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_PrincipalPlaceOfBusiness" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PrincipalPlaceOfBusiness"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_PrincipalPlaceOfBusiness" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="200.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_NameOfReportingEntityOrOtherMeansOfIdentification" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NameOfReportingEntityOrOtherMeansOfIdentification"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_NameOfReportingEntityOrOtherMeansOfIdentification" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="201.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_LegalFormOfEntity" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_LegalFormOfEntity"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_LegalFormOfEntity" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="202.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_CountryOfIncorporation" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CountryOfIncorporation"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_CountryOfIncorporation" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="203.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DomicileOfEntity" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DomicileOfEntity"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DomicileOfEntity" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="204.0"/>
    <loc xlink:type="locator" xlink:label="DotationsAuxAmortissementsEtProvisions" xlink:href="969500BVOHVZUUFWDT54-2024-12-31.xsd#gtt_DotationsAuxAmortissementsEtProvisions"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="DotationsAuxAmortissementsEtProvisions" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="205.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_OtherIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherIncome"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_OtherIncome" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="206.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInWorkingCapital"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="207.0"/>
    <loc xlink:type="locator" xlink:label="ifrs-full_DisclosureOfBasisOfConsolidationExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfBasisOfConsolidationExplanatory"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:to="ifrs-full_DisclosureOfBasisOfConsolidationExplanatory" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" order="208.0"/>
  </definitionLink>
</linkbase>