<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<!--Created by Prophix, Powered by IRIS Carbon, Unique Code 67e19a4ee304a7174005f999, Generated At Mon, 24 Mar 2025 17:45:50 GMT-->
<link:linkbase xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" />
  <link:arcroleRef arcroleURI="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/arcrole/esma-arcrole-2018-11-21.xsd#wider-narrower" />
  <link:roleRef roleURI="http://www.fluxys.com/xbrl/role/Mutatieoverzichtvanhetgeconsolideerdeigenvermogen" xlink:type="simple" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#Mutatieoverzichtvanhetgeconsolideerdeigenvermogen" />
  <link:roleRef roleURI="http://www.fluxys.com/xbrl/role/Anchoring" xlink:type="simple" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#Anchoring" />
  <link:roleRef roleURI="https://www.esma.europa.eu/xbrl/role/cor/esef_role-999999" xlink:type="simple" xlink:href="https://www.esma.europa.eu/taxonomy/2022-03-24/esef_cor.xsd#esef_role-999999" />
  <link:roleRef roleURI="http://www.fluxys.com/xbrl/role/MandatoryTags" xlink:type="simple" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#MandatoryTags" />
  <link:roleRef roleURI="http://www.fluxys.com/xbrl/role/Geconsolideerdebalans" xlink:type="simple" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#Geconsolideerdebalans" />
  <link:roleRef roleURI="http://www.fluxys.com/xbrl/role/Geconsolideerdewinstenverliesrekening" xlink:type="simple" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#Geconsolideerdewinstenverliesrekening" />
  <link:roleRef roleURI="http://www.fluxys.com/xbrl/role/GeconsolideerdewinstenverliesrekeningCalc2" xlink:type="simple" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#GeconsolideerdewinstenverliesrekeningCalc2" />
  <link:roleRef roleURI="http://www.fluxys.com/xbrl/role/Geconsolideerdoverzichtvanhettotaalresultaat" xlink:type="simple" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#Geconsolideerdoverzichtvanhettotaalresultaat" />
  <link:roleRef roleURI="http://www.fluxys.com/xbrl/role/GeconsolideerdoverzichtvanhettotaalresultaatCalc2" xlink:type="simple" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#GeconsolideerdoverzichtvanhettotaalresultaatCalc2" />
  <link:roleRef roleURI="http://www.fluxys.com/xbrl/role/Geconsolideerdkasstroomoverzicht" xlink:type="simple" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#Geconsolideerdkasstroomoverzicht" />
  <link:roleRef roleURI="http://www.fluxys.com/xbrl/role/Toelichtingen" xlink:type="simple" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#Toelichtingen" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.fluxys.com/xbrl/role/Mutatieoverzichtvanhetgeconsolideerdeigenvermogen">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfChangesInEquityLineItems" xlink:label="ifrs-full_StatementOfChangesInEquityLineItems" xlink:title="ifrs-full_StatementOfChangesInEquityLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfChangesInEquityTable" xlink:label="ifrs-full_StatementOfChangesInEquityTable" xlink:title="ifrs-full_StatementOfChangesInEquityTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_StatementOfChangesInEquityTable" xlink:title="Definition : ifrs-full_StatementOfChangesInEquityLineItems to ifrs-full_StatementOfChangesInEquityTable" xlink:type="arc" order="0" xbrldt:closed="true" xbrldt:contextElement="scenario" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="ifrs-full_ComponentsOfEquityAxis" xlink:title="ifrs-full_ComponentsOfEquityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_StatementOfChangesInEquityTable" xlink:to="ifrs-full_ComponentsOfEquityAxis" xlink:title="Definition : ifrs-full_StatementOfChangesInEquityTable to ifrs-full_ComponentsOfEquityAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityMember" xlink:label="ifrs-full_EquityMember" xlink:title="ifrs-full_EquityMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_EquityMember" xlink:title="Definition : ifrs-full_ComponentsOfEquityAxis to ifrs-full_EquityMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:label="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:title="ifrs-full_EquityAttributableToOwnersOfParentMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:title="Definition : ifrs-full_EquityMember to ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssuedCapitalMember" xlink:label="ifrs-full_IssuedCapitalMember" xlink:title="ifrs-full_IssuedCapitalMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:to="ifrs-full_IssuedCapitalMember" xlink:title="Definition : ifrs-full_EquityAttributableToOwnersOfParentMember to ifrs-full_IssuedCapitalMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_SharePremiumMember" xlink:label="ifrs-full_SharePremiumMember" xlink:title="ifrs-full_SharePremiumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:to="ifrs-full_SharePremiumMember" xlink:title="Definition : ifrs-full_EquityAttributableToOwnersOfParentMember to ifrs-full_SharePremiumMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherReservesMember" xlink:label="ifrs-full_OtherReservesMember" xlink:title="ifrs-full_OtherReservesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:to="ifrs-full_OtherReservesMember" xlink:title="Definition : ifrs-full_EquityAttributableToOwnersOfParentMember to ifrs-full_OtherReservesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RetainedEarningsMember" xlink:label="ifrs-full_RetainedEarningsMember" xlink:title="ifrs-full_RetainedEarningsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:to="ifrs-full_RetainedEarningsMember" xlink:title="Definition : ifrs-full_EquityAttributableToOwnersOfParentMember to ifrs-full_RetainedEarningsMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember" xlink:label="ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember" xlink:title="ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:to="ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_EquityAttributableToOwnersOfParentMember to ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:label="ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:title="ifrs-full_AccumulatedOtherComprehensiveIncomeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:to="ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:title="Definition : ifrs-full_EquityAttributableToOwnersOfParentMember to ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncontrollingInterestsMember" xlink:label="ifrs-full_NoncontrollingInterestsMember" xlink:title="ifrs-full_NoncontrollingInterestsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_NoncontrollingInterestsMember" xlink:title="Definition : ifrs-full_EquityMember to ifrs-full_NoncontrollingInterestsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:title="ifrs-full_Equity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_Equity" xlink:title="Definition : ifrs-full_StatementOfChangesInEquityLineItems to ifrs-full_Equity" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome" xlink:title="ifrs-full_ComprehensiveIncome" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_ComprehensiveIncome" xlink:title="Definition : ifrs-full_StatementOfChangesInEquityLineItems to ifrs-full_ComprehensiveIncome" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DividendsPaid" xlink:label="ifrs-full_DividendsPaid" xlink:title="ifrs-full_DividendsPaid" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_DividendsPaid" xlink:title="Definition : ifrs-full_StatementOfChangesInEquityLineItems to ifrs-full_DividendsPaid" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssueOfEquity" xlink:label="ifrs-full_IssueOfEquity" xlink:title="ifrs-full_IssueOfEquity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_IssueOfEquity" xlink:title="Definition : ifrs-full_StatementOfChangesInEquityLineItems to ifrs-full_IssueOfEquity" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.fluxys.com/xbrl/role/Anchoring">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:label="ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:title="ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:label="flux1_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:title="flux1_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:to="flux1_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:title="Definition : ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities to flux1_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_InterestsClassifiedAsFinancingActivities" xlink:label="flux1_InterestsClassifiedAsFinancingActivities" xlink:title="flux1_InterestsClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:to="flux1_InterestsClassifiedAsFinancingActivities" xlink:title="Definition : ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities to flux1_InterestsClassifiedAsFinancingActivities" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_InterestsReceivedClassifiedAsFinancingActivities" xlink:label="flux1_InterestsReceivedClassifiedAsFinancingActivities" xlink:title="flux1_InterestsReceivedClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:to="flux1_InterestsReceivedClassifiedAsFinancingActivities" xlink:title="Definition : ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities to flux1_InterestsReceivedClassifiedAsFinancingActivities" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_ProceedsFromCashFlowsFromFinancingActivities" xlink:label="flux1_ProceedsFromCashFlowsFromFinancingActivities" xlink:title="flux1_ProceedsFromCashFlowsFromFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="flux1_ProceedsFromCashFlowsFromFinancingActivities" xlink:title="Definition : ifrs-full_CashFlowsFromUsedInFinancingActivities to flux1_ProceedsFromCashFlowsFromFinancingActivities" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_RepaymentsRelatingToCashFlowsFromFinancingActivities" xlink:label="flux1_RepaymentsRelatingToCashFlowsFromFinancingActivities" xlink:title="flux1_RepaymentsRelatingToCashFlowsFromFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="flux1_RepaymentsRelatingToCashFlowsFromFinancingActivities" xlink:title="Definition : ifrs-full_CashFlowsFromUsedInFinancingActivities to flux1_RepaymentsRelatingToCashFlowsFromFinancingActivities" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RegulatoryDeferralAccountCreditBalances" xlink:label="ifrs-full_RegulatoryDeferralAccountCreditBalances" xlink:title="ifrs-full_RegulatoryDeferralAccountCreditBalances" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_NonCurrentRegulatoryLiabilities" xlink:label="flux1_NonCurrentRegulatoryLiabilities" xlink:title="flux1_NonCurrentRegulatoryLiabilities" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_RegulatoryDeferralAccountCreditBalances" xlink:to="flux1_NonCurrentRegulatoryLiabilities" xlink:title="Definition : ifrs-full_RegulatoryDeferralAccountCreditBalances to flux1_NonCurrentRegulatoryLiabilities" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_CurrentRegulatoryLiabilities" xlink:label="flux1_CurrentRegulatoryLiabilities" xlink:title="flux1_CurrentRegulatoryLiabilities" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_RegulatoryDeferralAccountCreditBalances" xlink:to="flux1_CurrentRegulatoryLiabilities" xlink:title="Definition : ifrs-full_RegulatoryDeferralAccountCreditBalances to flux1_CurrentRegulatoryLiabilities" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossFromOperatingActivities" xlink:label="ifrs-full_ProfitLossFromOperatingActivities" xlink:title="ifrs-full_ProfitLossFromOperatingActivities" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_NetProvisions" xlink:label="flux1_NetProvisions" xlink:title="flux1_NetProvisions" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_ProfitLossFromOperatingActivities" xlink:to="flux1_NetProvisions" xlink:title="Definition : ifrs-full_ProfitLossFromOperatingActivities to flux1_NetProvisions" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInOtherOperatingReceivables" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInOtherOperatingReceivables" xlink:title="ifrs-full_AdjustmentsForDecreaseIncreaseInOtherOperatingReceivables" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_AdjustmentsForDecreaseIncreaseInTaxReceivables" xlink:label="flux1_AdjustmentsForDecreaseIncreaseInTaxReceivables" xlink:title="flux1_AdjustmentsForDecreaseIncreaseInTaxReceivables" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_AdjustmentsForDecreaseIncreaseInOtherOperatingReceivables" xlink:to="flux1_AdjustmentsForDecreaseIncreaseInTaxReceivables" xlink:title="Definition : ifrs-full_AdjustmentsForDecreaseIncreaseInOtherOperatingReceivables to flux1_AdjustmentsForDecreaseIncreaseInTaxReceivables" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInOtherOperatingPayables" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherOperatingPayables" xlink:title="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherOperatingPayables" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_AdjustmentsForIncreaseDecreaseInTaxPayables" xlink:label="flux1_AdjustmentsForIncreaseDecreaseInTaxPayables" xlink:title="flux1_AdjustmentsForIncreaseDecreaseInTaxPayables" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherOperatingPayables" xlink:to="flux1_AdjustmentsForIncreaseDecreaseInTaxPayables" xlink:title="Definition : ifrs-full_AdjustmentsForIncreaseDecreaseInOtherOperatingPayables to flux1_AdjustmentsForIncreaseDecreaseInTaxPayables" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_CashFlowsFromUsedInOtherOperatingActivities" xlink:label="flux1_CashFlowsFromUsedInOtherOperatingActivities" xlink:title="flux1_CashFlowsFromUsedInOtherOperatingActivities" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:to="flux1_CashFlowsFromUsedInOtherOperatingActivities" xlink:title="Definition : ifrs-full_CashFlowsFromUsedInOperatingActivities to flux1_CashFlowsFromUsedInOtherOperatingActivities" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RevenueAndOperatingIncome" xlink:label="ifrs-full_RevenueAndOperatingIncome" xlink:title="ifrs-full_RevenueAndOperatingIncome" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_OperatingRevenue" xlink:label="flux1_OperatingRevenue" xlink:title="flux1_OperatingRevenue" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_RevenueAndOperatingIncome" xlink:to="flux1_OperatingRevenue" xlink:title="Definition : ifrs-full_RevenueAndOperatingIncome to flux1_OperatingRevenue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAttributableToOwnersOfParent" xlink:label="ifrs-full_EquityAttributableToOwnersOfParent" xlink:title="ifrs-full_EquityAttributableToOwnersOfParent" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_ShareCapitalAndSharePremiums" xlink:label="flux1_ShareCapitalAndSharePremiums" xlink:title="flux1_ShareCapitalAndSharePremiums" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_EquityAttributableToOwnersOfParent" xlink:to="flux1_ShareCapitalAndSharePremiums" xlink:title="Definition : ifrs-full_EquityAttributableToOwnersOfParent to flux1_ShareCapitalAndSharePremiums" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_RetainedEarningsAndOtherReserves" xlink:label="flux1_RetainedEarningsAndOtherReserves" xlink:title="flux1_RetainedEarningsAndOtherReserves" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_EquityAttributableToOwnersOfParent" xlink:to="flux1_RetainedEarningsAndOtherReserves" xlink:title="Definition : ifrs-full_EquityAttributableToOwnersOfParent to flux1_RetainedEarningsAndOtherReserves" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssuedCapital" xlink:label="ifrs-full_IssuedCapital" xlink:title="ifrs-full_IssuedCapital" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="flux1_ShareCapitalAndSharePremiums" xlink:to="ifrs-full_IssuedCapital" xlink:title="Definition : flux1_ShareCapitalAndSharePremiums to ifrs-full_IssuedCapital" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_SharePremium" xlink:label="ifrs-full_SharePremium" xlink:title="ifrs-full_SharePremium" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="flux1_ShareCapitalAndSharePremiums" xlink:to="ifrs-full_SharePremium" xlink:title="Definition : flux1_ShareCapitalAndSharePremiums to ifrs-full_SharePremium" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherReserves" xlink:label="ifrs-full_OtherReserves" xlink:title="ifrs-full_OtherReserves" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="flux1_RetainedEarningsAndOtherReserves" xlink:to="ifrs-full_OtherReserves" xlink:title="Definition : flux1_RetainedEarningsAndOtherReserves to ifrs-full_OtherReserves" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RetainedEarnings" xlink:label="ifrs-full_RetainedEarnings" xlink:title="ifrs-full_RetainedEarnings" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="flux1_RetainedEarningsAndOtherReserves" xlink:to="ifrs-full_RetainedEarnings" xlink:title="Definition : flux1_RetainedEarningsAndOtherReserves to ifrs-full_RetainedEarnings" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForReconcileProfitLoss" xlink:label="ifrs-full_AdjustmentsForReconcileProfitLoss" xlink:title="ifrs-full_AdjustmentsForReconcileProfitLoss" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" xlink:label="flux1_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" xlink:title="flux1_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_AdjustmentsForReconcileProfitLoss" xlink:to="flux1_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" xlink:title="Definition : ifrs-full_AdjustmentsForReconcileProfitLoss to flux1_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:label="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:title="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_RepaymentOfOtherFinancialLiabilities" xlink:label="flux1_RepaymentOfOtherFinancialLiabilities" xlink:title="flux1_RepaymentOfOtherFinancialLiabilities" />
    <link:definitionArc xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:to="flux1_RepaymentOfOtherFinancialLiabilities" xlink:title="Definition : ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities to flux1_RepaymentOfOtherFinancialLiabilities" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="https://www.esma.europa.eu/xbrl/role/cor/esef_role-999999">
    <link:loc xlink:type="locator" xlink:href="https://www.esma.europa.eu/taxonomy/2022-03-24/esef_cor.xsd#esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:label="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:title="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NameOfReportingEntityOrOtherMeansOfIdentification" xlink:label="ifrs-full_NameOfReportingEntityOrOtherMeansOfIdentification" xlink:title="ifrs-full_NameOfReportingEntityOrOtherMeansOfIdentification" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_NameOfReportingEntityOrOtherMeansOfIdentification" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_NameOfReportingEntityOrOtherMeansOfIdentification" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DomicileOfEntity" xlink:label="ifrs-full_DomicileOfEntity" xlink:title="ifrs-full_DomicileOfEntity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DomicileOfEntity" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DomicileOfEntity" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfJointVenturesExplanatory" xlink:label="ifrs-full_DisclosureOfJointVenturesExplanatory" xlink:title="ifrs-full_DisclosureOfJointVenturesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfJointVenturesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfJointVenturesExplanatory" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_LegalFormOfEntity" xlink:label="ifrs-full_LegalFormOfEntity" xlink:title="ifrs-full_LegalFormOfEntity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_LegalFormOfEntity" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_LegalFormOfEntity" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CountryOfIncorporation" xlink:label="ifrs-full_CountryOfIncorporation" xlink:title="ifrs-full_CountryOfIncorporation" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CountryOfIncorporation" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CountryOfIncorporation" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AddressOfRegisteredOfficeOfEntity" xlink:label="ifrs-full_AddressOfRegisteredOfficeOfEntity" xlink:title="ifrs-full_AddressOfRegisteredOfficeOfEntity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AddressOfRegisteredOfficeOfEntity" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_AddressOfRegisteredOfficeOfEntity" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PrincipalPlaceOfBusiness" xlink:label="ifrs-full_PrincipalPlaceOfBusiness" xlink:title="ifrs-full_PrincipalPlaceOfBusiness" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_PrincipalPlaceOfBusiness" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_PrincipalPlaceOfBusiness" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities" xlink:label="ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities" xlink:title="ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentAssets" xlink:label="ifrs-full_NoncurrentAssets" xlink:title="ifrs-full_NoncurrentAssets" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_NoncurrentAssets" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_NoncurrentAssets" xlink:type="arc" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="ifrs-full_PropertyPlantAndEquipment" xlink:title="ifrs-full_PropertyPlantAndEquipment" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_PropertyPlantAndEquipment" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_PropertyPlantAndEquipment" xlink:type="arc" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:title="ifrs-full_IntangibleAssetsOtherThanGoodwill" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:type="arc" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InvestmentAccountedForUsingEquityMethod" xlink:label="ifrs-full_InvestmentAccountedForUsingEquityMethod" xlink:title="ifrs-full_InvestmentAccountedForUsingEquityMethod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_InvestmentAccountedForUsingEquityMethod" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_InvestmentAccountedForUsingEquityMethod" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherNoncurrentFinancialAssets" xlink:label="ifrs-full_OtherNoncurrentFinancialAssets" xlink:title="ifrs-full_OtherNoncurrentFinancialAssets" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherNoncurrentFinancialAssets" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherNoncurrentFinancialAssets" xlink:type="arc" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherNoncurrentReceivables" xlink:label="ifrs-full_OtherNoncurrentReceivables" xlink:title="ifrs-full_OtherNoncurrentReceivables" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherNoncurrentReceivables" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherNoncurrentReceivables" xlink:type="arc" order="13" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherNoncurrentAssets" xlink:label="ifrs-full_OtherNoncurrentAssets" xlink:title="ifrs-full_OtherNoncurrentAssets" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherNoncurrentAssets" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherNoncurrentAssets" xlink:type="arc" order="14" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentAssets" xlink:label="ifrs-full_CurrentAssets" xlink:title="ifrs-full_CurrentAssets" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentAssets" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CurrentAssets" xlink:type="arc" order="15" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Inventories" xlink:label="ifrs-full_Inventories" xlink:title="ifrs-full_Inventories" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_Inventories" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_Inventories" xlink:type="arc" order="16" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentTaxAssetsCurrent" xlink:label="ifrs-full_CurrentTaxAssetsCurrent" xlink:title="ifrs-full_CurrentTaxAssetsCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentTaxAssetsCurrent" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CurrentTaxAssetsCurrent" xlink:type="arc" order="17" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TradeAndOtherCurrentReceivables" xlink:label="ifrs-full_TradeAndOtherCurrentReceivables" xlink:title="ifrs-full_TradeAndOtherCurrentReceivables" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_TradeAndOtherCurrentReceivables" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_TradeAndOtherCurrentReceivables" xlink:type="arc" order="18" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentInvestments" xlink:label="ifrs-full_CurrentInvestments" xlink:title="ifrs-full_CurrentInvestments" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentInvestments" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CurrentInvestments" xlink:type="arc" order="19" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents" xlink:title="ifrs-full_CashAndCashEquivalents" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CashAndCashEquivalents" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CashAndCashEquivalents" xlink:type="arc" order="20" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherCurrentAssets" xlink:label="ifrs-full_OtherCurrentAssets" xlink:title="ifrs-full_OtherCurrentAssets" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherCurrentAssets" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherCurrentAssets" xlink:type="arc" order="21" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Assets" xlink:label="ifrs-full_Assets" xlink:title="ifrs-full_Assets" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_Assets" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_Assets" xlink:type="arc" order="22" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:title="ifrs-full_Equity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_Equity" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_Equity" xlink:type="arc" order="23" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAttributableToOwnersOfParent" xlink:label="ifrs-full_EquityAttributableToOwnersOfParent" xlink:title="ifrs-full_EquityAttributableToOwnersOfParent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_EquityAttributableToOwnersOfParent" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_EquityAttributableToOwnersOfParent" xlink:type="arc" order="24" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_ShareCapitalAndSharePremiums" xlink:label="flux1_ShareCapitalAndSharePremiums" xlink:title="flux1_ShareCapitalAndSharePremiums" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_ShareCapitalAndSharePremiums" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_ShareCapitalAndSharePremiums" xlink:type="arc" order="25" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_RetainedEarningsAndOtherReserves" xlink:label="flux1_RetainedEarningsAndOtherReserves" xlink:title="flux1_RetainedEarningsAndOtherReserves" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_RetainedEarningsAndOtherReserves" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_RetainedEarningsAndOtherReserves" xlink:type="arc" order="26" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncontrollingInterests" xlink:label="ifrs-full_NoncontrollingInterests" xlink:title="ifrs-full_NoncontrollingInterests" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_NoncontrollingInterests" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_NoncontrollingInterests" xlink:type="arc" order="27" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentLiabilities" xlink:label="ifrs-full_NoncurrentLiabilities" xlink:title="ifrs-full_NoncurrentLiabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_NoncurrentLiabilities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_NoncurrentLiabilities" xlink:type="arc" order="28" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_LongtermBorrowings" xlink:label="ifrs-full_LongtermBorrowings" xlink:title="ifrs-full_LongtermBorrowings" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_LongtermBorrowings" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_LongtermBorrowings" xlink:type="arc" order="29" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherLongtermProvisions" xlink:label="ifrs-full_OtherLongtermProvisions" xlink:title="ifrs-full_OtherLongtermProvisions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherLongtermProvisions" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherLongtermProvisions" xlink:type="arc" order="30" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:label="ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:title="ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:type="arc" use="optional" order="31" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherNoncurrentFinancialLiabilities" xlink:label="ifrs-full_OtherNoncurrentFinancialLiabilities" xlink:title="ifrs-full_OtherNoncurrentFinancialLiabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherNoncurrentFinancialLiabilities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherNoncurrentFinancialLiabilities" xlink:type="arc" order="32" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DeferredTaxLiabilities" xlink:label="ifrs-full_DeferredTaxLiabilities" xlink:title="ifrs-full_DeferredTaxLiabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DeferredTaxLiabilities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DeferredTaxLiabilities" xlink:type="arc" order="33" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentLiabilities" xlink:label="ifrs-full_CurrentLiabilities" xlink:title="ifrs-full_CurrentLiabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentLiabilities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CurrentLiabilities" xlink:type="arc" order="34" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:label="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:title="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="arc" use="optional" order="35" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherShorttermProvisions" xlink:label="ifrs-full_OtherShorttermProvisions" xlink:title="ifrs-full_OtherShorttermProvisions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherShorttermProvisions" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherShorttermProvisions" xlink:type="arc" order="36" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:label="ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:title="ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:type="arc" use="optional" order="37" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:label="ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:title="ifrs-full_CurrentTaxLiabilitiesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:type="arc" order="38" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TradeAndOtherCurrentPayables" xlink:label="ifrs-full_TradeAndOtherCurrentPayables" xlink:title="ifrs-full_TradeAndOtherCurrentPayables" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_TradeAndOtherCurrentPayables" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_TradeAndOtherCurrentPayables" xlink:type="arc" order="39" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherCurrentLiabilities" xlink:label="ifrs-full_OtherCurrentLiabilities" xlink:title="ifrs-full_OtherCurrentLiabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherCurrentLiabilities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherCurrentLiabilities" xlink:type="arc" order="40" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAndLiabilities" xlink:label="ifrs-full_EquityAndLiabilities" xlink:title="ifrs-full_EquityAndLiabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_EquityAndLiabilities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_EquityAndLiabilities" xlink:type="arc" order="41" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherIncome" xlink:label="ifrs-full_OtherIncome" xlink:title="ifrs-full_OtherIncome" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherIncome" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherIncome" xlink:type="arc" order="42" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RawMaterialsAndConsumablesUsed" xlink:label="ifrs-full_RawMaterialsAndConsumablesUsed" xlink:title="ifrs-full_RawMaterialsAndConsumablesUsed" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_RawMaterialsAndConsumablesUsed" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_RawMaterialsAndConsumablesUsed" xlink:type="arc" order="43" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_MiscellaneousOtherOperatingExpense" xlink:label="ifrs-full_MiscellaneousOtherOperatingExpense" xlink:title="ifrs-full_MiscellaneousOtherOperatingExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_MiscellaneousOtherOperatingExpense" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_MiscellaneousOtherOperatingExpense" xlink:type="arc" order="44" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EmployeeBenefitsExpense" xlink:label="ifrs-full_EmployeeBenefitsExpense" xlink:title="ifrs-full_EmployeeBenefitsExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_EmployeeBenefitsExpense" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_EmployeeBenefitsExpense" xlink:type="arc" order="45" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherExpenseByNature" xlink:label="ifrs-full_OtherExpenseByNature" xlink:title="ifrs-full_OtherExpenseByNature" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherExpenseByNature" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherExpenseByNature" xlink:type="arc" order="46" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DepreciationExpense" xlink:label="ifrs-full_DepreciationExpense" xlink:title="ifrs-full_DepreciationExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DepreciationExpense" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DepreciationExpense" xlink:type="arc" order="47" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_NetProvisions" xlink:label="flux1_NetProvisions" xlink:title="flux1_NetProvisions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_NetProvisions" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_NetProvisions" xlink:type="arc" order="48" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:label="ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:type="arc" order="49" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinanceIncome" xlink:label="ifrs-full_FinanceIncome" xlink:title="ifrs-full_FinanceIncome" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_FinanceIncome" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_FinanceIncome" xlink:type="arc" order="50" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinanceCosts" xlink:label="ifrs-full_FinanceCosts" xlink:title="ifrs-full_FinanceCosts" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_FinanceCosts" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_FinanceCosts" xlink:type="arc" order="51" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="ifrs-full_ProfitLossBeforeTax" xlink:title="ifrs-full_ProfitLossBeforeTax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ProfitLossBeforeTax" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_ProfitLossBeforeTax" xlink:type="arc" order="52" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:title="ifrs-full_IncomeTaxExpenseContinuingOperations" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:type="arc" order="53" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:title="ifrs-full_ProfitLoss" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ProfitLoss" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_ProfitLoss" xlink:type="arc" order="54" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:label="ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:title="ifrs-full_ProfitLossAttributableToOwnersOfParent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:type="arc" order="55" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:label="ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:title="ifrs-full_ProfitLossAttributableToNoncontrollingInterests" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:type="arc" order="56" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_BasicEarningsLossPerShare" xlink:label="ifrs-full_BasicEarningsLossPerShare" xlink:title="ifrs-full_BasicEarningsLossPerShare" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_BasicEarningsLossPerShare" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_BasicEarningsLossPerShare" xlink:type="arc" order="57" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DilutedEarningsLossPerShare" xlink:label="ifrs-full_DilutedEarningsLossPerShare" xlink:title="ifrs-full_DilutedEarningsLossPerShare" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DilutedEarningsLossPerShare" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DilutedEarningsLossPerShare" xlink:type="arc" order="58" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:label="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:title="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:type="arc" order="59" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" xlink:label="ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" xlink:title="ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" xlink:type="arc" order="60" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherComprehensiveIncome" xlink:label="ifrs-full_OtherComprehensiveIncome" xlink:title="ifrs-full_OtherComprehensiveIncome" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherComprehensiveIncome" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherComprehensiveIncome" xlink:type="arc" order="61" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome" xlink:title="ifrs-full_ComprehensiveIncome" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ComprehensiveIncome" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_ComprehensiveIncome" xlink:type="arc" order="62" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:label="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:title="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:type="arc" order="63" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:label="ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:title="ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:type="arc" order="64" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DividendsPaid" xlink:label="ifrs-full_DividendsPaid" xlink:title="ifrs-full_DividendsPaid" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DividendsPaid" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DividendsPaid" xlink:type="arc" use="optional" order="65" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:type="arc" order="66" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssueOfEquity" xlink:label="ifrs-full_IssueOfEquity" xlink:title="ifrs-full_IssueOfEquity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IssueOfEquity" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_IssueOfEquity" xlink:type="arc" use="optional" order="67" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperations" xlink:label="ifrs-full_CashFlowsFromUsedInOperations" xlink:title="ifrs-full_CashFlowsFromUsedInOperations" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CashFlowsFromUsedInOperations" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CashFlowsFromUsedInOperations" xlink:type="arc" order="68" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital" xlink:label="ifrs-full_AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital" xlink:title="ifrs-full_AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital" xlink:type="arc" use="optional" order="69" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForDepreciationExpense" xlink:label="ifrs-full_AdjustmentsForDepreciationExpense" xlink:title="ifrs-full_AdjustmentsForDepreciationExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsForDepreciationExpense" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_AdjustmentsForDepreciationExpense" xlink:type="arc" use="optional" order="70" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForProvisions" xlink:label="ifrs-full_AdjustmentsForProvisions" xlink:title="ifrs-full_AdjustmentsForProvisions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsForProvisions" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_AdjustmentsForProvisions" xlink:type="arc" order="71" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:label="ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:type="arc" order="72" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherAdjustmentsForNoncashItems" xlink:label="ifrs-full_OtherAdjustmentsForNoncashItems" xlink:title="ifrs-full_OtherAdjustmentsForNoncashItems" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherAdjustmentsForNoncashItems" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherAdjustmentsForNoncashItems" xlink:type="arc" order="73" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:title="ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:type="arc" order="74" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_AdjustmentsForDecreaseIncreaseInTaxReceivables" xlink:label="flux1_AdjustmentsForDecreaseIncreaseInTaxReceivables" xlink:title="flux1_AdjustmentsForDecreaseIncreaseInTaxReceivables" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_AdjustmentsForDecreaseIncreaseInTaxReceivables" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_AdjustmentsForDecreaseIncreaseInTaxReceivables" xlink:type="arc" order="75" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:title="ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:type="arc" order="76" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:title="ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:type="arc" order="77" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_AdjustmentsForIncreaseDecreaseInTaxPayables" xlink:label="flux1_AdjustmentsForIncreaseDecreaseInTaxPayables" xlink:title="flux1_AdjustmentsForIncreaseDecreaseInTaxPayables" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_AdjustmentsForIncreaseDecreaseInTaxPayables" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_AdjustmentsForIncreaseDecreaseInTaxPayables" xlink:type="arc" order="78" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:title="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:type="arc" order="79" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities" xlink:title="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities" xlink:type="arc" order="80" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_CashFlowsFromUsedInOtherOperatingActivities" xlink:label="flux1_CashFlowsFromUsedInOtherOperatingActivities" xlink:title="flux1_CashFlowsFromUsedInOtherOperatingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_CashFlowsFromUsedInOtherOperatingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_CashFlowsFromUsedInOtherOperatingActivities" xlink:type="arc" order="81" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:label="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:title="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:type="arc" order="82" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:label="ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:title="ifrs-full_InterestReceivedClassifiedAsOperatingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:type="arc" order="83" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:label="ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:title="ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:type="arc" order="84" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInInvestingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:type="arc" order="85" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OutflowsOfCashFromInvestingActivities" xlink:label="ifrs-full_OutflowsOfCashFromInvestingActivities" xlink:title="ifrs-full_OutflowsOfCashFromInvestingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OutflowsOfCashFromInvestingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_OutflowsOfCashFromInvestingActivities" xlink:type="arc" use="optional" order="86" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:title="ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:type="arc" order="87" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:label="ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:title="ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:type="arc" use="optional" order="88" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InflowsOfCashFromInvestingActivities" xlink:label="ifrs-full_InflowsOfCashFromInvestingActivities" xlink:title="ifrs-full_InflowsOfCashFromInvestingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_InflowsOfCashFromInvestingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_InflowsOfCashFromInvestingActivities" xlink:type="arc" use="optional" order="89" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:label="ifrs-full_ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:title="ifrs-full_ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:type="arc" use="optional" order="90" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:label="ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:title="ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:type="arc" use="optional" order="91" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments" xlink:label="ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments" xlink:title="ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments" xlink:type="arc" use="optional" order="92" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:type="arc" order="93" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_ProceedsFromCashFlowsFromFinancingActivities" xlink:label="flux1_ProceedsFromCashFlowsFromFinancingActivities" xlink:title="flux1_ProceedsFromCashFlowsFromFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_ProceedsFromCashFlowsFromFinancingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_ProceedsFromCashFlowsFromFinancingActivities" xlink:type="arc" order="94" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromIssuingOtherEquityInstruments" xlink:label="ifrs-full_ProceedsFromIssuingOtherEquityInstruments" xlink:title="ifrs-full_ProceedsFromIssuingOtherEquityInstruments" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ProceedsFromIssuingOtherEquityInstruments" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_ProceedsFromIssuingOtherEquityInstruments" xlink:type="arc" order="95" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:label="flux1_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:title="flux1_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:type="arc" order="96" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_RepaymentsRelatingToCashFlowsFromFinancingActivities" xlink:label="flux1_RepaymentsRelatingToCashFlowsFromFinancingActivities" xlink:title="flux1_RepaymentsRelatingToCashFlowsFromFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_RepaymentsRelatingToCashFlowsFromFinancingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_RepaymentsRelatingToCashFlowsFromFinancingActivities" xlink:type="arc" order="97" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:label="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:title="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:type="arc" order="98" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_RepaymentOfOtherFinancialLiabilities" xlink:label="flux1_RepaymentOfOtherFinancialLiabilities" xlink:title="flux1_RepaymentOfOtherFinancialLiabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_RepaymentOfOtherFinancialLiabilities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_RepaymentOfOtherFinancialLiabilities" xlink:type="arc" order="99" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_InterestsClassifiedAsFinancingActivities" xlink:label="flux1_InterestsClassifiedAsFinancingActivities" xlink:title="flux1_InterestsClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_InterestsClassifiedAsFinancingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_InterestsClassifiedAsFinancingActivities" xlink:type="arc" order="100" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InterestPaidClassifiedAsFinancingActivities" xlink:label="ifrs-full_InterestPaidClassifiedAsFinancingActivities" xlink:title="ifrs-full_InterestPaidClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_InterestPaidClassifiedAsFinancingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_InterestPaidClassifiedAsFinancingActivities" xlink:type="arc" order="101" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_InterestsReceivedClassifiedAsFinancingActivities" xlink:label="flux1_InterestsReceivedClassifiedAsFinancingActivities" xlink:title="flux1_InterestsReceivedClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_InterestsReceivedClassifiedAsFinancingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_InterestsReceivedClassifiedAsFinancingActivities" xlink:type="arc" order="102" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:label="ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:title="ifrs-full_DividendsPaidClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:type="arc" order="103" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:title="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:type="arc" order="104" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RightofuseAssets" xlink:label="ifrs-full_RightofuseAssets" xlink:title="ifrs-full_RightofuseAssets" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_RightofuseAssets" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_RightofuseAssets" xlink:type="arc" use="optional" order="105" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentFinanceLeaseReceivables" xlink:label="ifrs-full_CurrentFinanceLeaseReceivables" xlink:title="ifrs-full_CurrentFinanceLeaseReceivables" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentFinanceLeaseReceivables" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CurrentFinanceLeaseReceivables" xlink:type="arc" use="optional" order="106" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_NonCurrentRegulatoryLiabilities" xlink:label="flux1_NonCurrentRegulatoryLiabilities" xlink:title="flux1_NonCurrentRegulatoryLiabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_NonCurrentRegulatoryLiabilities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_NonCurrentRegulatoryLiabilities" xlink:type="arc" order="107" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_CurrentRegulatoryLiabilities" xlink:label="flux1_CurrentRegulatoryLiabilities" xlink:title="flux1_CurrentRegulatoryLiabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_CurrentRegulatoryLiabilities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_CurrentRegulatoryLiabilities" xlink:type="arc" order="108" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:label="ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:title="ifrs-full_IncreaseDecreaseInWorkingCapital" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:type="arc" use="optional" order="109" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory" xlink:label="ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory" xlink:title="ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory" xlink:type="arc" use="optional" order="110" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:label="ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:title="ifrs-full_DisclosureOfRelatedPartyExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:type="arc" use="optional" order="111" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory" xlink:label="ifrs-full_DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory" xlink:title="ifrs-full_DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory" xlink:type="arc" use="optional" order="112" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:title="ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:type="arc" use="optional" order="113" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:label="ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:title="ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:type="arc" use="optional" order="114" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:label="ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:title="ifrs-full_DisclosureOfDeferredTaxesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:type="arc" use="optional" order="115" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory" xlink:label="ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory" xlink:title="ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory" xlink:type="arc" use="optional" order="116" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfProvisionsExplanatory" xlink:label="ifrs-full_DisclosureOfProvisionsExplanatory" xlink:title="ifrs-full_DisclosureOfProvisionsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfProvisionsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfProvisionsExplanatory" xlink:type="arc" use="optional" order="117" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:label="ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:title="ifrs-full_DisclosureOfBorrowingsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:type="arc" use="optional" order="118" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory" xlink:label="ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory" xlink:title="ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory" xlink:type="arc" use="optional" order="119" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherCurrentAssetsExplanatory" xlink:label="ifrs-full_DisclosureOfOtherCurrentAssetsExplanatory" xlink:title="ifrs-full_DisclosureOfOtherCurrentAssetsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfOtherCurrentAssetsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfOtherCurrentAssetsExplanatory" xlink:type="arc" use="optional" order="120" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:label="ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:title="ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:type="arc" use="optional" order="121" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInventoriesExplanatory" xlink:label="ifrs-full_DisclosureOfInventoriesExplanatory" xlink:title="ifrs-full_DisclosureOfInventoriesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfInventoriesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfInventoriesExplanatory" xlink:type="arc" use="optional" order="122" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherNoncurrentAssetsExplanatory" xlink:label="ifrs-full_DisclosureOfOtherNoncurrentAssetsExplanatory" xlink:title="ifrs-full_DisclosureOfOtherNoncurrentAssetsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfOtherNoncurrentAssetsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfOtherNoncurrentAssetsExplanatory" xlink:type="arc" use="optional" order="123" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinancialAssetsExplanatory" xlink:label="ifrs-full_DisclosureOfFinancialAssetsExplanatory" xlink:title="ifrs-full_DisclosureOfFinancialAssetsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfFinancialAssetsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfFinancialAssetsExplanatory" xlink:type="arc" use="optional" order="124" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfIntangibleAssetsExplanatory" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsExplanatory" xlink:title="ifrs-full_DisclosureOfIntangibleAssetsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfIntangibleAssetsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfIntangibleAssetsExplanatory" xlink:type="arc" use="optional" order="125" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:title="ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:type="arc" use="optional" order="126" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfEarningsPerShareExplanatory" xlink:label="ifrs-full_DisclosureOfEarningsPerShareExplanatory" xlink:title="ifrs-full_DisclosureOfEarningsPerShareExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfEarningsPerShareExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfEarningsPerShareExplanatory" xlink:type="arc" use="optional" order="127" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:label="ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:title="ifrs-full_DisclosureOfIncomeTaxExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:type="arc" use="optional" order="128" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInterestExpenseExplanatory" xlink:label="ifrs-full_DisclosureOfInterestExpenseExplanatory" xlink:title="ifrs-full_DisclosureOfInterestExpenseExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfInterestExpenseExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfInterestExpenseExplanatory" xlink:type="arc" use="optional" order="129" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinanceIncomeExplanatory" xlink:label="ifrs-full_DisclosureOfFinanceIncomeExplanatory" xlink:title="ifrs-full_DisclosureOfFinanceIncomeExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfFinanceIncomeExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfFinanceIncomeExplanatory" xlink:type="arc" use="optional" order="130" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfExpensesExplanatory" xlink:label="ifrs-full_DisclosureOfExpensesExplanatory" xlink:title="ifrs-full_DisclosureOfExpensesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfExpensesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfExpensesExplanatory" xlink:type="arc" use="optional" order="131" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfRevenueExplanatory" xlink:label="ifrs-full_DisclosureOfRevenueExplanatory" xlink:title="ifrs-full_DisclosureOfRevenueExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfRevenueExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfRevenueExplanatory" xlink:type="arc" use="optional" order="132" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:label="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:title="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:type="arc" use="optional" order="133" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory" xlink:label="ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory" xlink:title="ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:to="ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory" xlink:title="Definition : ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory to ifrs-full_DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfBasisOfConsolidationExplanatory" xlink:label="ifrs-full_DisclosureOfBasisOfConsolidationExplanatory" xlink:title="ifrs-full_DisclosureOfBasisOfConsolidationExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:to="ifrs-full_DisclosureOfBasisOfConsolidationExplanatory" xlink:title="Definition : ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory to ifrs-full_DisclosureOfBasisOfConsolidationExplanatory" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" xlink:title="Definition : ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory to ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" xlink:title="Definition : ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory to ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:title="Definition : ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory to ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" xlink:title="Definition : ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory to ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories" xlink:title="Definition : ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory to ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForBorrowingCostsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForBorrowingCostsExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForBorrowingCostsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForBorrowingCostsExplanatory" xlink:title="Definition : ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory to ifrs-full_DescriptionOfAccountingPolicyForBorrowingCostsExplanatory" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory" xlink:title="Definition : ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory to ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:title="Definition : ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory to ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory" xlink:title="Definition : ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory to ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations" xlink:label="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations" xlink:title="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations" xlink:type="arc" use="optional" order="134" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfInitialApplicationOfStandardsOrInterpretations" xlink:label="ifrs-full_DescriptionOfInitialApplicationOfStandardsOrInterpretations" xlink:title="ifrs-full_DescriptionOfInitialApplicationOfStandardsOrInterpretations" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfInitialApplicationOfStandardsOrInterpretations" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfInitialApplicationOfStandardsOrInterpretations" xlink:type="arc" use="optional" order="135" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfAuthorisationOfFinancialStatementsExplanatory" xlink:label="ifrs-full_DisclosureOfAuthorisationOfFinancialStatementsExplanatory" xlink:title="ifrs-full_DisclosureOfAuthorisationOfFinancialStatementsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfAuthorisationOfFinancialStatementsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfAuthorisationOfFinancialStatementsExplanatory" xlink:type="arc" use="optional" order="136" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfAccountingJudgementsAndEstimatesExplanatory" xlink:label="ifrs-full_DisclosureOfAccountingJudgementsAndEstimatesExplanatory" xlink:title="ifrs-full_DisclosureOfAccountingJudgementsAndEstimatesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfAccountingJudgementsAndEstimatesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfAccountingJudgementsAndEstimatesExplanatory" xlink:type="arc" use="optional" order="137" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfIFRSCompliance" xlink:label="ifrs-full_StatementOfIFRSCompliance" xlink:title="ifrs-full_StatementOfIFRSCompliance" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_StatementOfIFRSCompliance" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_StatementOfIFRSCompliance" xlink:type="arc" use="optional" order="138" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:label="ifrs-full_DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:title="ifrs-full_DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:type="arc" use="optional" order="139" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:title="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:type="arc" use="optional" order="140" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:label="ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:title="ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:type="arc" use="optional" order="141" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherOperatingIncomeExplanatory" xlink:label="ifrs-full_DisclosureOfOtherOperatingIncomeExplanatory" xlink:title="ifrs-full_DisclosureOfOtherOperatingIncomeExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfOtherOperatingIncomeExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfOtherOperatingIncomeExplanatory" xlink:type="arc" use="optional" order="142" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory" xlink:label="ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory" xlink:title="ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory" xlink:type="arc" use="optional" order="143" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory" xlink:label="ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory" xlink:title="ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory" xlink:type="arc" use="optional" order="144" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:label="ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:title="ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:type="arc" use="optional" order="145" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInterestIncomeExplanatory" xlink:label="ifrs-full_DisclosureOfInterestIncomeExplanatory" xlink:title="ifrs-full_DisclosureOfInterestIncomeExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfInterestIncomeExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfInterestIncomeExplanatory" xlink:type="arc" use="optional" order="146" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInterestIncomeExpenseExplanatory" xlink:label="ifrs-full_DisclosureOfInterestIncomeExpenseExplanatory" xlink:title="ifrs-full_DisclosureOfInterestIncomeExpenseExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfInterestIncomeExpenseExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfInterestIncomeExpenseExplanatory" xlink:type="arc" use="optional" order="147" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinanceCostExplanatory" xlink:label="ifrs-full_DisclosureOfFinanceCostExplanatory" xlink:title="ifrs-full_DisclosureOfFinanceCostExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfFinanceCostExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfFinanceCostExplanatory" xlink:type="arc" use="optional" order="148" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDepreciationAndAmortisationExpenseExplanatory" xlink:label="ifrs-full_DisclosureOfDepreciationAndAmortisationExpenseExplanatory" xlink:title="ifrs-full_DisclosureOfDepreciationAndAmortisationExpenseExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfDepreciationAndAmortisationExpenseExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfDepreciationAndAmortisationExpenseExplanatory" xlink:type="arc" use="optional" order="149" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfIntangibleAssetsAndGoodwillExplanatory" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsAndGoodwillExplanatory" xlink:title="ifrs-full_DisclosureOfIntangibleAssetsAndGoodwillExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfIntangibleAssetsAndGoodwillExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfIntangibleAssetsAndGoodwillExplanatory" xlink:type="arc" use="optional" order="150" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfLeasesExplanatory" xlink:label="ifrs-full_DisclosureOfLeasesExplanatory" xlink:title="ifrs-full_DisclosureOfLeasesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfLeasesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfLeasesExplanatory" xlink:type="arc" use="optional" order="151" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory" xlink:title="ifrs-full_DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory" xlink:type="arc" use="optional" order="152" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherAssetsExplanatory" xlink:label="ifrs-full_DisclosureOfOtherAssetsExplanatory" xlink:title="ifrs-full_DisclosureOfOtherAssetsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfOtherAssetsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfOtherAssetsExplanatory" xlink:type="arc" use="optional" order="153" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" xlink:label="ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" xlink:title="ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" xlink:type="arc" use="optional" order="154" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDepositsFromBanksExplanatory" xlink:label="ifrs-full_DisclosureOfDepositsFromBanksExplanatory" xlink:title="ifrs-full_DisclosureOfDepositsFromBanksExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfDepositsFromBanksExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfDepositsFromBanksExplanatory" xlink:type="arc" use="optional" order="155" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForSubsidiariesExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForSubsidiariesExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForSubsidiariesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForSubsidiariesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForSubsidiariesExplanatory" xlink:type="arc" use="optional" order="156" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" xlink:type="arc" use="optional" order="157" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForInvestmentsInJointVentures" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForInvestmentsInJointVentures" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForInvestmentsInJointVentures" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForInvestmentsInJointVentures" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForInvestmentsInJointVentures" xlink:type="arc" use="optional" order="158" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory" xlink:type="arc" use="optional" order="159" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForEmissionRightsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForEmissionRightsExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForEmissionRightsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForEmissionRightsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForEmissionRightsExplanatory" xlink:type="arc" use="optional" order="160" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForDepreciationExpenseExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForDepreciationExpenseExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForDepreciationExpenseExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForDepreciationExpenseExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForDepreciationExpenseExplanatory" xlink:type="arc" use="optional" order="161" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:type="arc" use="optional" order="162" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfCommitmentsExplanatory" xlink:label="ifrs-full_DisclosureOfCommitmentsExplanatory" xlink:title="ifrs-full_DisclosureOfCommitmentsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfCommitmentsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfCommitmentsExplanatory" xlink:type="arc" use="optional" order="163" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory" xlink:label="ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory" xlink:title="ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory" xlink:type="arc" use="optional" order="164" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfContingentLiabilitiesExplanatory" xlink:label="ifrs-full_DisclosureOfContingentLiabilitiesExplanatory" xlink:title="ifrs-full_DisclosureOfContingentLiabilitiesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfContingentLiabilitiesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfContingentLiabilitiesExplanatory" xlink:type="arc" use="optional" order="165" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinancialAssetsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFinancialAssetsExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForFinancialAssetsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForFinancialAssetsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForFinancialAssetsExplanatory" xlink:type="arc" use="optional" order="166" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory" xlink:type="arc" use="optional" order="167" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory" xlink:type="arc" use="optional" order="168" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory" xlink:type="arc" use="optional" order="169" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForBorrowingsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForBorrowingsExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForBorrowingsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForBorrowingsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForBorrowingsExplanatory" xlink:type="arc" use="optional" order="170" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFairValueMeasurementExplanatory" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementExplanatory" xlink:title="ifrs-full_DisclosureOfFairValueMeasurementExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfFairValueMeasurementExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfFairValueMeasurementExplanatory" xlink:type="arc" use="optional" order="171" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFairValueOfFinancialInstrumentsExplanatory" xlink:label="ifrs-full_DisclosureOfFairValueOfFinancialInstrumentsExplanatory" xlink:title="ifrs-full_DisclosureOfFairValueOfFinancialInstrumentsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfFairValueOfFinancialInstrumentsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfFairValueOfFinancialInstrumentsExplanatory" xlink:type="arc" use="optional" order="172" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfAllowanceForCreditLossesExplanatory" xlink:label="ifrs-full_DisclosureOfAllowanceForCreditLossesExplanatory" xlink:title="ifrs-full_DisclosureOfAllowanceForCreditLossesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfAllowanceForCreditLossesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfAllowanceForCreditLossesExplanatory" xlink:type="arc" use="optional" order="173" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfAuditorsRemunerationExplanatory" xlink:label="ifrs-full_DisclosureOfAuditorsRemunerationExplanatory" xlink:title="ifrs-full_DisclosureOfAuditorsRemunerationExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfAuditorsRemunerationExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfAuditorsRemunerationExplanatory" xlink:type="arc" use="optional" order="174" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory" xlink:label="ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory" xlink:title="ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory" xlink:type="arc" use="optional" order="175" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfCreditRiskExplanatory" xlink:label="ifrs-full_DisclosureOfCreditRiskExplanatory" xlink:title="ifrs-full_DisclosureOfCreditRiskExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfCreditRiskExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfCreditRiskExplanatory" xlink:type="arc" use="optional" order="176" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinancialRiskManagementExplanatory" xlink:label="ifrs-full_DisclosureOfFinancialRiskManagementExplanatory" xlink:title="ifrs-full_DisclosureOfFinancialRiskManagementExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfFinancialRiskManagementExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfFinancialRiskManagementExplanatory" xlink:type="arc" use="optional" order="177" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfIssuedCapitalExplanatory" xlink:label="ifrs-full_DisclosureOfIssuedCapitalExplanatory" xlink:title="ifrs-full_DisclosureOfIssuedCapitalExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfIssuedCapitalExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfIssuedCapitalExplanatory" xlink:type="arc" use="optional" order="178" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfLiquidityRiskExplanatory" xlink:label="ifrs-full_DisclosureOfLiquidityRiskExplanatory" xlink:title="ifrs-full_DisclosureOfLiquidityRiskExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfLiquidityRiskExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfLiquidityRiskExplanatory" xlink:type="arc" use="optional" order="179" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfMarketRiskExplanatory" xlink:label="ifrs-full_DisclosureOfMarketRiskExplanatory" xlink:title="ifrs-full_DisclosureOfMarketRiskExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfMarketRiskExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfMarketRiskExplanatory" xlink:type="arc" use="optional" order="180" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfEmployeeBenefitsExplanatory" xlink:label="ifrs-full_DisclosureOfEmployeeBenefitsExplanatory" xlink:title="ifrs-full_DisclosureOfEmployeeBenefitsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfEmployeeBenefitsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfEmployeeBenefitsExplanatory" xlink:type="arc" use="optional" order="181" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfGeneralAndAdministrativeExpenseExplanatory" xlink:label="ifrs-full_DisclosureOfGeneralAndAdministrativeExpenseExplanatory" xlink:title="ifrs-full_DisclosureOfGeneralAndAdministrativeExpenseExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfGeneralAndAdministrativeExpenseExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfGeneralAndAdministrativeExpenseExplanatory" xlink:type="arc" use="optional" order="182" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory" xlink:label="ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory" xlink:title="ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory" xlink:type="arc" use="optional" order="183" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory" xlink:label="ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory" xlink:title="ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory" xlink:type="arc" use="optional" order="184" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory" xlink:type="arc" use="optional" order="185" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" xlink:label="ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" xlink:title="ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents" xlink:type="arc" use="optional" order="186" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory" xlink:type="arc" use="optional" order="187" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory" xlink:type="arc" use="optional" order="188" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" xlink:type="arc" use="optional" order="189" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss" xlink:label="ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss" xlink:title="ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss" xlink:type="arc" use="optional" order="190" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:label="ifrs-full_DisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:title="ifrs-full_DisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory" xlink:type="arc" use="optional" order="191" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfRegulatoryDeferralAccountsExplanatory" xlink:label="ifrs-full_DisclosureOfRegulatoryDeferralAccountsExplanatory" xlink:title="ifrs-full_DisclosureOfRegulatoryDeferralAccountsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfRegulatoryDeferralAccountsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfRegulatoryDeferralAccountsExplanatory" xlink:type="arc" use="optional" order="192" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfAdditionalInformationExplanatory" xlink:label="ifrs-full_DisclosureOfAdditionalInformationExplanatory" xlink:title="ifrs-full_DisclosureOfAdditionalInformationExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfAdditionalInformationExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfAdditionalInformationExplanatory" xlink:type="arc" order="193" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory" xlink:label="ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory" xlink:title="ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory" xlink:type="arc" use="optional" order="194" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory" xlink:label="ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory" xlink:title="ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory" xlink:type="arc" use="optional" order="195" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:label="ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:title="ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:type="arc" use="optional" order="196" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForDerecognitionOfFinancialInstrumentsExplanatory" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForDerecognitionOfFinancialInstrumentsExplanatory" xlink:title="ifrs-full_DescriptionOfAccountingPolicyForDerecognitionOfFinancialInstrumentsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DescriptionOfAccountingPolicyForDerecognitionOfFinancialInstrumentsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DescriptionOfAccountingPolicyForDerecognitionOfFinancialInstrumentsExplanatory" xlink:type="arc" use="optional" order="197" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_OperatingRevenue" xlink:label="flux1_OperatingRevenue" xlink:title="flux1_OperatingRevenue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_OperatingRevenue" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_OperatingRevenue" xlink:type="arc" order="198" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RevenueFromSaleOfNaturalGas" xlink:label="ifrs-full_RevenueFromSaleOfNaturalGas" xlink:title="ifrs-full_RevenueFromSaleOfNaturalGas" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_RevenueFromSaleOfNaturalGas" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_RevenueFromSaleOfNaturalGas" xlink:type="arc" use="optional" order="199" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CostOfPurchasedEnergySold" xlink:label="ifrs-full_CostOfPurchasedEnergySold" xlink:title="ifrs-full_CostOfPurchasedEnergySold" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CostOfPurchasedEnergySold" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_CostOfPurchasedEnergySold" xlink:type="arc" use="optional" order="200" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" xlink:label="flux1_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" xlink:title="flux1_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="flux1_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to flux1_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" xlink:type="arc" order="201" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfChangesInAccountingPoliciesAccountingEstimatesAndErrorsExplanatory" xlink:label="ifrs-full_DisclosureOfChangesInAccountingPoliciesAccountingEstimatesAndErrorsExplanatory" xlink:title="ifrs-full_DisclosureOfChangesInAccountingPoliciesAccountingEstimatesAndErrorsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfChangesInAccountingPoliciesAccountingEstimatesAndErrorsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfChangesInAccountingPoliciesAccountingEstimatesAndErrorsExplanatory" xlink:type="arc" use="optional" order="202" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfPrepaymentsAndOtherAssetsExplanatory" xlink:label="ifrs-full_DisclosureOfPrepaymentsAndOtherAssetsExplanatory" xlink:title="ifrs-full_DisclosureOfPrepaymentsAndOtherAssetsExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfPrepaymentsAndOtherAssetsExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfPrepaymentsAndOtherAssetsExplanatory" xlink:type="arc" use="optional" order="203" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory" xlink:label="ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory" xlink:title="ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory" xlink:type="arc" use="optional" order="204" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossFromOperatingActivities" xlink:label="ifrs-full_ProfitLossFromOperatingActivities" xlink:title="ifrs-full_ProfitLossFromOperatingActivities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ProfitLossFromOperatingActivities" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_ProfitLossFromOperatingActivities" xlink:type="arc" order="205" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:label="ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:title="ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:title="Definition : esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:type="arc" use="optional" order="206" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://www.fluxys.com/xbrl/role/MandatoryTags" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.fluxys.com/xbrl/role/Geconsolideerdebalans" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.fluxys.com/xbrl/role/Geconsolideerdewinstenverliesrekening" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.fluxys.com/xbrl/role/GeconsolideerdewinstenverliesrekeningCalc2" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.fluxys.com/xbrl/role/Geconsolideerdoverzichtvanhettotaalresultaat" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.fluxys.com/xbrl/role/GeconsolideerdoverzichtvanhettotaalresultaatCalc2" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.fluxys.com/xbrl/role/Geconsolideerdkasstroomoverzicht" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.fluxys.com/xbrl/role/Toelichtingen" />
</link:linkbase>