<?xml version="1.0" encoding="utf-8"?>
<!--Generated by DataTracks Rainbow version 3.0 for Toppan Merrill on 31-March-2022 [03:14:34] {PM}-->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
<roleRef xlink:type="simple" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#ConsolidatedStatementOfChangesInEquity" roleURI="http://www.orange.be/role/ConsolidatedStatementOfChangesInEquity" />
<roleRef xlink:type="simple" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#ConsolidatedStatementOfComprehensiveIncome" roleURI="http://www.orange.be/role/ConsolidatedStatementOfComprehensiveIncome" />
<roleRef xlink:type="simple" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#ConsolidatedCashFlowStatement" roleURI="http://www.orange.be/role/ConsolidatedCashFlowStatement" />
<roleRef xlink:type="simple" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#Cover" roleURI="http://www.orange.be/role/Cover" />
<roleRef xlink:type="simple" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#ConsolidatedStatementOfFinancialPosition" roleURI="http://www.orange.be/role/ConsolidatedStatementOfFinancialPosition" />
<roleRef xlink:type="simple" xlink:href="http://www.esma.europa.eu/taxonomy/2020-03-16/esef_cor.xsd#ifrs-dim_role-990000" roleURI="http://www.esma.europa.eu/xbrl/role/cor/ifrs-dim_role-990000" />
<roleRef xlink:type="simple" xlink:href="http://www.esma.europa.eu/taxonomy/2020-03-16/esef_cor.xsd#esef_role-999999" roleURI="http://www.esma.europa.eu/xbrl/role/cor/esef_role-999999" />
<roleRef xlink:type="simple" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#Anchoring" roleURI="http://www.orange.be/role/Anchoring" />
<arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" />
<arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" />
<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" />
<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" />
<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" />
<arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/notAll" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#notAll" />
<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" />
<definitionLink xlink:type="extended" xlink:role="http://www.orange.be/role/ConsolidatedStatementOfChangesInEquity">
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_StatementOfChangesInEquityLineItems" xlink:label="loc_ifrs-full_StatementOfChangesInEquityLineItems_171" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_StatementOfChangesInEquityTable" xlink:label="loc_ifrs-full_StatementOfChangesInEquityTable_163" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_171" xlink:to="loc_ifrs-full_StatementOfChangesInEquityTable_163" xbrldt:contextElement="scenario" xbrldt:closed="true" use="optional" order="1" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_164" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_StatementOfChangesInEquityTable_163" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_164" use="optional" order="2" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_EquityMember" xlink:label="loc_ifrs-full_EquityMember_165" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_164" xlink:to="loc_ifrs-full_EquityMember_165" use="optional" order="3" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_TreasurySharesMember" xlink:label="loc_ifrs-full_TreasurySharesMember_175" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityMember_165" xlink:to="loc_ifrs-full_TreasurySharesMember_175" use="optional" order="4" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IssuedCapitalMember" xlink:label="loc_ifrs-full_IssuedCapitalMember_172" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityMember_165" xlink:to="loc_ifrs-full_IssuedCapitalMember_172" use="optional" order="5" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherReservesMember" xlink:label="loc_ifrs-full_OtherReservesMember_173" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityMember_165" xlink:to="loc_ifrs-full_OtherReservesMember_173" use="optional" order="6" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RetainedEarningsMember" xlink:label="loc_ifrs-full_RetainedEarningsMember_174" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityMember_165" xlink:to="loc_ifrs-full_RetainedEarningsMember_174" use="optional" order="7" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:label="loc_ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis_166" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_StatementOfChangesInEquityTable_163" xlink:to="loc_ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis_166" use="optional" order="8" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RestatedMember" xlink:label="loc_ifrs-full_RestatedMember_167" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis_166" xlink:to="loc_ifrs-full_RestatedMember_167" use="optional" order="9" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_IncreaseDecreaseDueToApplicationOfIfrs16Member" xlink:label="loc_obel_IncreaseDecreaseDueToApplicationOfIfrs16Member_180" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RestatedMember_167" xlink:to="loc_obel_IncreaseDecreaseDueToApplicationOfIfrs16Member_180" use="optional" order="10" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_PpaAdjustmentUpsizeNVMember" xlink:label="loc_obel_PpaAdjustmentUpsizeNVMember_682422" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RestatedMember_167" xlink:to="loc_obel_PpaAdjustmentUpsizeNVMember_682422" use="optional" order="11" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PreviouslyStatedMember" xlink:label="loc_ifrs-full_PreviouslyStatedMember_176" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RestatedMember_167" xlink:to="loc_ifrs-full_PreviouslyStatedMember_176" use="optional" order="12" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_AsRestatedMember" xlink:label="loc_obel_AsRestatedMember_177" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RestatedMember_167" xlink:to="loc_obel_AsRestatedMember_177" use="optional" order="13" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseDueToApplicationOfIFRS15Member" xlink:label="loc_ifrs-full_IncreaseDecreaseDueToApplicationOfIFRS15Member_170" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RestatedMember_167" xlink:to="loc_ifrs-full_IncreaseDecreaseDueToApplicationOfIFRS15Member_170" use="optional" order="14" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_FinancialEffectOfChangesInAccountingPolicyMember" xlink:label="loc_ifrs-full_FinancialEffectOfChangesInAccountingPolicyMember_169" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyAndCorrectionsOfPriorPeriodErrorsMember_168" xlink:to="loc_ifrs-full_FinancialEffectOfChangesInAccountingPolicyMember_169" use="optional" order="15" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_FinancialEffectOfChangesInAccountingPolicyMember" xlink:label="loc_ifrs-full_FinancialEffectOfChangesInAccountingPolicyMember_181" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IncreaseDecreaseDueToApplicationOfIFRS15Member_170" xlink:to="loc_ifrs-full_FinancialEffectOfChangesInAccountingPolicyMember_181" use="optional" order="16" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyAndCorrectionsOfPriorPeriodErrorsMember" xlink:label="loc_ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyAndCorrectionsOfPriorPeriodErrorsMember_168" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RestatedMember_167" xlink:to="loc_ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyAndCorrectionsOfPriorPeriodErrorsMember_168" use="optional" order="17" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRSsMember" xlink:label="loc_ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRSsMember_178" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialEffectOfChangesInAccountingPolicyMember_169" xlink:to="loc_ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRSsMember_178" use="optional" order="18" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_IncreaseDecreaseDueToApplicationOfIfrs9Member" xlink:label="loc_obel_IncreaseDecreaseDueToApplicationOfIfrs9Member_179" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RestatedMember_167" xlink:to="loc_obel_IncreaseDecreaseDueToApplicationOfIfrs9Member_179" use="optional" order="19" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProfitLoss" xlink:label="loc_ifrs-full_ProfitLoss_183" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_171" xlink:to="loc_ifrs-full_ProfitLoss_183" use="optional" order="20" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges_184" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_171" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges_184" use="optional" order="21" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Equity" xlink:label="loc_ifrs-full_Equity_682436" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_171" xlink:to="loc_ifrs-full_Equity_682436" use="optional" order="22" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ComprehensiveIncome" xlink:label="loc_ifrs-full_ComprehensiveIncome_185" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_171" xlink:to="loc_ifrs-full_ComprehensiveIncome_185" use="optional" order="23" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions_186" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_171" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions_186" use="optional" order="24" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_187" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_171" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_187" use="optional" order="25" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DividendsPaid" xlink:label="loc_ifrs-full_DividendsPaid_188" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_171" xlink:to="loc_ifrs-full_DividendsPaid_188" use="optional" order="26" />
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.esma.europa.eu/xbrl/role/cor/ifrs-dim_role-990000" />
<definitionLink xlink:type="extended" xlink:role="http://www.esma.europa.eu/xbrl/role/cor/esef_role-999999">

<loc xlink:type="locator" xlink:href="http://www.esma.europa.eu/taxonomy/2020-03-16/esef_cor.xsd#esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:label="loc_LineItemsNotDimensionallyQualifiedPlaceholder" />

<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities" xlink:label="loc_ifrs-full_DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities_151" />

<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities_151" xbrldt:contextElement="scenario" xbrldt:closed="true" use="optional" order="1" />

<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:label="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities_152" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities_152" use="optional" order="2" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:label="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_153" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_153" use="optional" order="3" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:label="loc_ifrs-full_AdjustmentsForIncomeTaxExpense_126" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForIncomeTaxExpense_126" use="optional" order="4" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForUndistributedProfitsOfAssociates" xlink:label="loc_ifrs-full_AdjustmentsForUndistributedProfitsOfAssociates_125" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForUndistributedProfitsOfAssociates_125" use="optional" order="5" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:label="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities_146" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities_146" use="optional" order="6" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForProvisions" xlink:label="loc_ifrs-full_AdjustmentsForProvisions_124" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForProvisions_124" use="optional" order="7" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets" xlink:label="loc_ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets_123" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets_123" use="optional" order="8" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:label="loc_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_148" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_148" use="optional" order="9" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RepaymentsOfNoncurrentBorrowings" xlink:label="loc_ifrs-full_RepaymentsOfNoncurrentBorrowings_147" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_RepaymentsOfNoncurrentBorrowings_147" use="optional" order="10" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForFinanceCosts" xlink:label="loc_ifrs-full_AdjustmentsForFinanceCosts_127" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForFinanceCosts_127" use="optional" order="11" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_AdjustmentsForOperationalForeignExchangeAndDerivativesLossesGainsNet" xlink:label="loc_obel_AdjustmentsForOperationalForeignExchangeAndDerivativesLossesGainsNet_128" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_AdjustmentsForOperationalForeignExchangeAndDerivativesLossesGainsNet_128" use="optional" order="12" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAccountPayable" xlink:label="loc_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAccountPayable_133" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAccountPayable_133" use="optional" order="13" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForSharebasedPayments" xlink:label="loc_ifrs-full_AdjustmentsForSharebasedPayments_129" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForSharebasedPayments_129" use="optional" order="14" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories_131" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories_131" use="optional" order="15" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_132" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_132" use="optional" order="16" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_AdjustmentsForDepreciationAndAmortisationExpenseRightOfUseAssets" xlink:label="loc_obel_AdjustmentsForDepreciationAndAmortisationExpenseRightOfUseAssets_121" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_AdjustmentsForDepreciationAndAmortisationExpenseRightOfUseAssets_121" use="optional" order="17" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:label="loc_ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets_141" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets_141" use="optional" order="18" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:label="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges_157" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges_157" use="optional" order="19" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_AdjustmentsForIncreaseDecreaseInOtherAssetsAndDecreaseIncreaseInOtherLiabilities" xlink:label="loc_obel_AdjustmentsForIncreaseDecreaseInOtherAssetsAndDecreaseIncreaseInOtherLiabilities_136" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_AdjustmentsForIncreaseDecreaseInOtherAssetsAndDecreaseIncreaseInOtherLiabilities_136" use="optional" order="20" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="loc_ifrs-full_CashAndCashEquivalents_158" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CashAndCashEquivalents_158" use="optional" order="21" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Cash" xlink:label="loc_ifrs-full_Cash_159" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_Cash_159" use="optional" order="22" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_OrganicCashFlow" xlink:label="loc_obel_OrganicCashFlow_143" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_OrganicCashFlow_143" use="optional" order="23" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_IncreaseDecreaseInPayablesRelatedToPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill" xlink:label="loc_obel_IncreaseDecreaseInPayablesRelatedToPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_142" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_IncreaseDecreaseInPayablesRelatedToPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_142" use="optional" order="24" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncomeTaxesPaidClassifiedAsOperatingActivities" xlink:label="loc_ifrs-full_IncomeTaxesPaidClassifiedAsOperatingActivities_139" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_IncomeTaxesPaidClassifiedAsOperatingActivities_139" use="optional" order="25" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashEquivalents" xlink:label="loc_ifrs-full_CashEquivalents_160" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CashEquivalents_160" use="optional" order="26" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings" xlink:label="loc_ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings_149" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings_149" use="optional" order="27" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInOtherOperatingPayables" xlink:label="loc_ifrs-full_AdjustmentsForIncreaseDecreaseInOtherOperatingPayables_119" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForIncreaseDecreaseInOtherOperatingPayables_119" use="optional" order="28" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense" xlink:label="loc_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense_120" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense_120" use="optional" order="29" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities_723351" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities_723351" use="optional" order="30" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForImpairmentLossRecognisedInProfitOrLossGoodwill" xlink:label="loc_ifrs-full_AdjustmentsForImpairmentLossRecognisedInProfitOrLossGoodwill_717806" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForImpairmentLossRecognisedInProfitOrLossGoodwill_717806" use="optional" order="31" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:label="loc_ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_122" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_122" use="optional" order="32" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeAndOtherReceivables" xlink:label="loc_ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeAndOtherReceivables_130" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeAndOtherReceivables_130" use="optional" order="33" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_AdjustmentsForIncreaseDecreaseInCustomerContractLiabilities" xlink:label="loc_obel_AdjustmentsForIncreaseDecreaseInCustomerContractLiabilities_135" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_AdjustmentsForIncreaseDecreaseInCustomerContractLiabilities_135" use="optional" order="34" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:label="loc_ifrs-full_InterestPaidClassifiedAsOperatingActivities_138" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_InterestPaidClassifiedAsOperatingActivities_138" use="optional" order="35" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:label="loc_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_144" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_144" use="optional" order="36" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments" xlink:label="loc_ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments_145" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments_145" use="optional" order="37" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PaymentsToAcquireOrRedeemEntitysShares" xlink:label="loc_ifrs-full_PaymentsToAcquireOrRedeemEntitysShares_150" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_PaymentsToAcquireOrRedeemEntitysShares_150" use="optional" order="38" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_AdjustmentsForIncreaseDecreaseInCustomerContractAssets" xlink:label="loc_obel_AdjustmentsForIncreaseDecreaseInCustomerContractAssets_134" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_AdjustmentsForIncreaseDecreaseInCustomerContractAssets_134" use="optional" order="39" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:label="loc_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities_137" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities_137" use="optional" order="40" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions_186" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions_186" use="optional" order="41" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_187" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_187" use="optional" order="42" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DividendsPaid" xlink:label="loc_ifrs-full_DividendsPaid_188" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_DividendsPaid_188" use="optional" order="43" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Equity" xlink:label="loc_ifrs-full_Equity_682436" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_Equity_682436" use="optional" order="44" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RevenueFromRenderingOfInterconnectionServices" xlink:label="loc_ifrs-full_RevenueFromRenderingOfInterconnectionServices_22" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_RevenueFromRenderingOfInterconnectionServices_22" use="optional" order="45" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_RevenueFromConvergentServices" xlink:label="loc_obel_RevenueFromConvergentServices_17" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_RevenueFromConvergentServices_17" use="optional" order="46" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_OtherDirectCosts" xlink:label="loc_obel_OtherDirectCosts_26" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_OtherDirectCosts_26" use="optional" order="47" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProfitLossFromOperatingActivities" xlink:label="loc_ifrs-full_ProfitLossFromOperatingActivities_42" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ProfitLossFromOperatingActivities_42" use="optional" order="48" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_FinanceIncomeCost" xlink:label="loc_ifrs-full_FinanceIncomeCost_43" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_FinanceIncomeCost_43" use="optional" order="49" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_FinanceCosts" xlink:label="loc_ifrs-full_FinanceCosts_44" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_FinanceCosts_44" use="optional" order="50" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_FinanceIncome" xlink:label="loc_ifrs-full_FinanceIncome_45" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_FinanceIncome_45" use="optional" order="51" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLossTradeReceivables" xlink:label="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLossTradeReceivables_27" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLossTradeReceivables_27" use="optional" order="52" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_DirectCosts" xlink:label="loc_obel_DirectCosts_28" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_DirectCosts_28" use="optional" order="53" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_EmployeeBenefitsExpense" xlink:label="loc_ifrs-full_EmployeeBenefitsExpense_29" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_EmployeeBenefitsExpense_29" use="optional" order="54" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_SalesAndMarketingExpense" xlink:label="loc_ifrs-full_SalesAndMarketingExpense_30" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_SalesAndMarketingExpense_30" use="optional" order="55" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RevenueFromRenderingOfOtherTelecommunicationServices" xlink:label="loc_ifrs-full_RevenueFromRenderingOfOtherTelecommunicationServices_23" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_RevenueFromRenderingOfOtherTelecommunicationServices_23" use="optional" order="56" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_IndirectCosts" xlink:label="loc_obel_IndirectCosts_37" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_IndirectCosts_37" use="optional" order="57" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_GeneralAndAdministrativeExpense" xlink:label="loc_ifrs-full_GeneralAndAdministrativeExpense_33" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_GeneralAndAdministrativeExpense_33" use="optional" order="58" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges_51" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges_51" use="optional" order="59" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod" xlink:label="loc_ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod_41" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod_41" use="optional" order="60" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:label="loc_ifrs-full_ProfitLossAttributableToOwnersOfParent_49" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ProfitLossAttributableToOwnersOfParent_49" use="optional" order="61" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ComprehensiveIncome" xlink:label="loc_ifrs-full_ComprehensiveIncome_52" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ComprehensiveIncome_52" use="optional" order="62" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:label="loc_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent_53" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent_53" use="optional" order="63" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_BasicEarningsLossPerShare" xlink:label="loc_ifrs-full_BasicEarningsLossPerShare_54" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_BasicEarningsLossPerShare_54" use="optional" order="64" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_WeightedAverageShares" xlink:label="loc_ifrs-full_WeightedAverageShares_55" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_WeightedAverageShares_55" use="optional" order="65" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DilutedEarningsLossPerShare" xlink:label="loc_ifrs-full_DilutedEarningsLossPerShare_56" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_DilutedEarningsLossPerShare_56" use="optional" order="66" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustedWeightedAverageShares" xlink:label="loc_ifrs-full_AdjustedWeightedAverageShares_57" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AdjustedWeightedAverageShares_57" use="optional" order="67" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Revenue" xlink:label="loc_ifrs-full_Revenue_24" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_Revenue_24" use="optional" order="68" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_OtherInformationTechnologyAndNetworkExpenses" xlink:label="loc_obel_OtherInformationTechnologyAndNetworkExpenses_31" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_OtherInformationTechnologyAndNetworkExpenses_31" use="optional" order="69" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="loc_ifrs-full_ProfitLossBeforeTax_46" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ProfitLossBeforeTax_46" use="optional" order="70" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_47" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_47" use="optional" order="71" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DepreciationRightofuseAssets" xlink:label="loc_ifrs-full_DepreciationRightofuseAssets_717808" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_DepreciationRightofuseAssets_717808" use="optional" order="72" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DepreciationAndAmortisationExpense" xlink:label="loc_ifrs-full_DepreciationAndAmortisationExpense_39" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_DepreciationAndAmortisationExpense_39" use="optional" order="73" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RevenueFromRenderingOfTelecommunicationServices" xlink:label="loc_ifrs-full_RevenueFromRenderingOfTelecommunicationServices_16" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_RevenueFromRenderingOfTelecommunicationServices_16" use="optional" order="74" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RevenueFromRenderingOfInternetAndDataServices" xlink:label="loc_ifrs-full_RevenueFromRenderingOfInternetAndDataServices_717792" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_RevenueFromRenderingOfInternetAndDataServices_717792" use="optional" order="75" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RevenueFromRenderingOfLandLineTelephoneServices" xlink:label="loc_ifrs-full_RevenueFromRenderingOfLandLineTelephoneServices_717791" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_RevenueFromRenderingOfLandLineTelephoneServices_717791" use="optional" order="76" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RevenueFromRenderingOfMobileTelephoneServices" xlink:label="loc_ifrs-full_RevenueFromRenderingOfMobileTelephoneServices_717790" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_RevenueFromRenderingOfMobileTelephoneServices_717790" use="optional" order="77" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ExpenseOfRestructuringActivities" xlink:label="loc_ifrs-full_ExpenseOfRestructuringActivities_38" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ExpenseOfRestructuringActivities_38" use="optional" order="78" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_MiscellaneousOtherOperatingExpense" xlink:label="loc_ifrs-full_MiscellaneousOtherOperatingExpense_35" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_MiscellaneousOtherOperatingExpense_35" use="optional" order="79" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RevenueFromSaleOfTelecommunicationEquipment" xlink:label="loc_ifrs-full_RevenueFromSaleOfTelecommunicationEquipment_717793" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_RevenueFromSaleOfTelecommunicationEquipment_717793" use="optional" order="80" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_MiscellaneousOtherOperatingIncome" xlink:label="loc_ifrs-full_MiscellaneousOtherOperatingIncome_34" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_MiscellaneousOtherOperatingIncome_34" use="optional" order="81" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PropertyServiceChargeExpense" xlink:label="loc_ifrs-full_PropertyServiceChargeExpense_32" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_PropertyServiceChargeExpense_32" use="optional" order="82" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProfitLoss" xlink:label="loc_ifrs-full_ProfitLoss_48" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ProfitLoss_48" use="optional" order="83" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill" xlink:label="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill_717805" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill_717805" use="optional" order="84" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLoss" xlink:label="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss_40" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss_40" use="optional" order="85" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CostOfSales" xlink:label="loc_ifrs-full_CostOfSales_25" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CostOfSales_25" use="optional" order="86" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentTradeReceivables" xlink:label="loc_ifrs-full_CurrentTradeReceivables_72" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentTradeReceivables_72" use="optional" order="87" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_ContractAssetsAndAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersCurrent" xlink:label="loc_obel_ContractAssetsAndAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersCurrent_73" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_ContractAssetsAndAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersCurrent_73" use="optional" order="88" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_64" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_PropertyPlantAndEquipment_64" use="optional" order="89" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:label="loc_ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax_77" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax_77" use="optional" order="90" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherNoncurrentFinancialAssets" xlink:label="loc_ifrs-full_OtherNoncurrentFinancialAssets_67" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_OtherNoncurrentFinancialAssets_67" use="optional" order="91" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherNoncurrentAssets" xlink:label="loc_ifrs-full_OtherNoncurrentAssets_68" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_OtherNoncurrentAssets_68" use="optional" order="92" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_InvestmentAccountedForUsingEquityMethod" xlink:label="loc_ifrs-full_InvestmentAccountedForUsingEquityMethod_66" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_InvestmentAccountedForUsingEquityMethod_66" use="optional" order="93" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Inventories" xlink:label="loc_ifrs-full_Inventories_71" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_Inventories_71" use="optional" order="94" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Goodwill" xlink:label="loc_ifrs-full_Goodwill_62" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_Goodwill_62" use="optional" order="95" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_EquityAttributableToOwnersOfParent" xlink:label="loc_ifrs-full_EquityAttributableToOwnersOfParent_87" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_EquityAttributableToOwnersOfParent_87" use="optional" order="96" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NoncurrentAssets" xlink:label="loc_ifrs-full_NoncurrentAssets_70" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_NoncurrentAssets_70" use="optional" order="97" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:label="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill_63" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill_63" use="optional" order="98" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RightofuseAssetsThatDoNotMeetDefinitionOfInvestmentProperty" xlink:label="loc_ifrs-full_RightofuseAssetsThatDoNotMeetDefinitionOfInvestmentProperty_65" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_RightofuseAssetsThatDoNotMeetDefinitionOfInvestmentProperty_65" use="optional" order="99" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherCurrentAssets" xlink:label="loc_ifrs-full_OtherCurrentAssets_76" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_OtherCurrentAssets_76" use="optional" order="100" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DeferredTaxAssets" xlink:label="loc_ifrs-full_DeferredTaxAssets_69" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_DeferredTaxAssets_69" use="optional" order="101" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NoncurrentLeaseLiabilities" xlink:label="loc_ifrs-full_NoncurrentLeaseLiabilities_90" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_NoncurrentLeaseLiabilities_90" use="optional" order="102" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NoncurrentProvisionsForEmployeeBenefits" xlink:label="loc_ifrs-full_NoncurrentProvisionsForEmployeeBenefits_92" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_NoncurrentProvisionsForEmployeeBenefits_92" use="optional" order="103" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentPrepaidExpenses" xlink:label="loc_ifrs-full_CurrentPrepaidExpenses_79" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentPrepaidExpenses_79" use="optional" order="104" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentAssets" xlink:label="loc_ifrs-full_CurrentAssets_81" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentAssets_81" use="optional" order="105" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Assets" xlink:label="loc_ifrs-full_Assets_82" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_Assets_82" use="optional" order="106" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherCurrentFinancialAssets" xlink:label="loc_ifrs-full_OtherCurrentFinancialAssets_74" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_OtherCurrentFinancialAssets_74" use="optional" order="107" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ShorttermProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:label="loc_ifrs-full_ShorttermProvisionForDecommissioningRestorationAndRehabilitationCosts_103" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ShorttermProvisionForDecommissioningRestorationAndRehabilitationCosts_103" use="optional" order="108" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_CurrentPayablesOnTaxesOtherThanIncomeTax" xlink:label="loc_obel_CurrentPayablesOnTaxesOtherThanIncomeTax_106" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_obel_CurrentPayablesOnTaxesOtherThanIncomeTax_106" use="optional" order="109" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:label="loc_ifrs-full_CurrentTaxLiabilitiesCurrent_107" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentTaxLiabilitiesCurrent_107" use="optional" order="110" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentContractLiabilities" xlink:label="loc_ifrs-full_CurrentContractLiabilities_108" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentContractLiabilities_108" use="optional" order="111" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DeferredIncomeClassifiedAsCurrent" xlink:label="loc_ifrs-full_DeferredIncomeClassifiedAsCurrent_109" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_DeferredIncomeClassifiedAsCurrent_109" use="optional" order="112" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IssuedCapital" xlink:label="loc_ifrs-full_IssuedCapital_83" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_IssuedCapital_83" use="optional" order="113" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherReserves" xlink:label="loc_ifrs-full_OtherReserves_84" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_OtherReserves_84" use="optional" order="114" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RetainedEarnings" xlink:label="loc_ifrs-full_RetainedEarnings_85" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_RetainedEarnings_85" use="optional" order="115" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_TreasuryShares" xlink:label="loc_ifrs-full_TreasuryShares_86" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_TreasuryShares_86" use="optional" order="116" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentDerivativeFinancialAssets" xlink:label="loc_ifrs-full_CurrentDerivativeFinancialAssets_75" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentDerivativeFinancialAssets_75" use="optional" order="117" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentTaxAssetsCurrent" xlink:label="loc_ifrs-full_CurrentTaxAssetsCurrent_78" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentTaxAssetsCurrent_78" use="optional" order="118" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_LongtermBorrowings" xlink:label="loc_ifrs-full_LongtermBorrowings_89" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_LongtermBorrowings_89" use="optional" order="119" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentDerivativeFinancialLiabilities" xlink:label="loc_ifrs-full_CurrentDerivativeFinancialLiabilities_101" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentDerivativeFinancialLiabilities_101" use="optional" order="120" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentLeaseLiabilities" xlink:label="loc_ifrs-full_CurrentLeaseLiabilities_100" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentLeaseLiabilities_100" use="optional" order="121" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentLiabilities" xlink:label="loc_ifrs-full_CurrentLiabilities_110" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentLiabilities_110" use="optional" order="122" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentPayablesForPurchaseOfNoncurrentAssets" xlink:label="loc_ifrs-full_CurrentPayablesForPurchaseOfNoncurrentAssets_97" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentPayablesForPurchaseOfNoncurrentAssets_97" use="optional" order="123" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:label="loc_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_98" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_98" use="optional" order="124" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:label="loc_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings_99" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings_99" use="optional" order="125" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_EquityAndLiabilities" xlink:label="loc_ifrs-full_EquityAndLiabilities_111" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_EquityAndLiabilities_111" use="optional" order="126" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentProvisionsForEmployeeBenefits" xlink:label="loc_ifrs-full_CurrentProvisionsForEmployeeBenefits_102" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CurrentProvisionsForEmployeeBenefits_102" use="optional" order="127" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:label="loc_ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts_93" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts_93" use="optional" order="128" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ShorttermRestructuringProvision" xlink:label="loc_ifrs-full_ShorttermRestructuringProvision_104" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_ShorttermRestructuringProvision_104" use="optional" order="129" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherCurrentLiabilities" xlink:label="loc_ifrs-full_OtherCurrentLiabilities_105" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_OtherCurrentLiabilities_105" use="optional" order="130" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherNoncurrentLiabilities" xlink:label="loc_ifrs-full_OtherNoncurrentLiabilities_94" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_OtherNoncurrentLiabilities_94" use="optional" order="131" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DeferredTaxLiabilities" xlink:label="loc_ifrs-full_DeferredTaxLiabilities_95" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_DeferredTaxLiabilities_95" use="optional" order="132" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NoncurrentLiabilities" xlink:label="loc_ifrs-full_NoncurrentLiabilities_96" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_NoncurrentLiabilities_96" use="optional" order="133" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NameOfReportingEntityOrOtherMeansOfIdentification" xlink:label="loc_ifrs-full_NameOfReportingEntityOrOtherMeansOfIdentification_3" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_NameOfReportingEntityOrOtherMeansOfIdentification_3" use="optional" order="134" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PrincipalPlaceOfBusiness" xlink:label="loc_ifrs-full_PrincipalPlaceOfBusiness_4" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_PrincipalPlaceOfBusiness_4" use="optional" order="135" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DateOfEndOfReportingPeriod2013" xlink:label="loc_ifrs-full_DateOfEndOfReportingPeriod2013_10" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_DateOfEndOfReportingPeriod2013_10" use="optional" order="136" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DomicileOfEntity" xlink:label="loc_ifrs-full_DomicileOfEntity_11" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_DomicileOfEntity_11" use="optional" order="137" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_LegalFormOfEntity" xlink:label="loc_ifrs-full_LegalFormOfEntity_12" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_LegalFormOfEntity_12" use="optional" order="138" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AddressOfRegisteredOfficeOfEntity" xlink:label="loc_ifrs-full_AddressOfRegisteredOfficeOfEntity_5" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_AddressOfRegisteredOfficeOfEntity_5" use="optional" order="139" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NameOfParentEntity" xlink:label="loc_ifrs-full_NameOfParentEntity_6" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_NameOfParentEntity_6" use="optional" order="140" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CountryOfIncorporation" xlink:label="loc_ifrs-full_CountryOfIncorporation_7" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_CountryOfIncorporation_7" use="optional" order="141" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities" xlink:label="loc_ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities_8" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities_8" use="optional" order="142" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NameOfUltimateParentOfGroup" xlink:label="loc_ifrs-full_NameOfUltimateParentOfGroup_9" />
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="loc_ifrs-full_NameOfUltimateParentOfGroup_9" use="optional" order="143" />
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://www.orange.be/role/Anchoring">
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForReconcileProfitLoss" xlink:label="AdjustmentsForReconcileProfitLoss" xlink:title="AdjustmentsForReconcileProfitLoss" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_AdjustmentsForOperationalForeignExchangeAndDerivativesLossesGainsNet" xlink:label="AdjustmentsForOperationalForeignExchangeAndDerivativesLossesGainsNet" xlink:title="AdjustmentsForOperationalForeignExchangeAndDerivativesLossesGainsNet" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="AdjustmentsForReconcileProfitLoss" xlink:to="AdjustmentsForOperationalForeignExchangeAndDerivativesLossesGainsNet" xlink:title="definition: AdjustmentsForReconcileProfitLoss to AdjustmentsForOperationalForeignExchangeAndDerivativesLossesGainsNet" order="1.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense" xlink:label="AdjustmentsForDepreciationAndAmortisationExpense" xlink:title="AdjustmentsForDepreciationAndAmortisationExpense" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_AdjustmentsForDepreciationAndAmortisationExpenseRightOfUseAssets" xlink:label="AdjustmentsForDepreciationAndAmortisationExpenseRightOfUseAssets" xlink:title="AdjustmentsForDepreciationAndAmortisationExpenseRightOfUseAssets" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="AdjustmentsForDepreciationAndAmortisationExpense" xlink:to="AdjustmentsForDepreciationAndAmortisationExpenseRightOfUseAssets" xlink:title="definition: AdjustmentsForDepreciationAndAmortisationExpense to AdjustmentsForDepreciationAndAmortisationExpenseRightOfUseAssets" order="1.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities" xlink:label="OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities" xlink:title="OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_OrganicCashFlow" xlink:label="OrganicCashFlow" xlink:title="OrganicCashFlow" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities" xlink:to="OrganicCashFlow" xlink:title="definition: OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities to OrganicCashFlow" order="1.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:label="CashFlowsFromUsedInFinancingActivities" xlink:title="CashFlowsFromUsedInFinancingActivities" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OrganicCashFlow" xlink:to="CashFlowsFromUsedInFinancingActivities" xlink:title="definition: OrganicCashFlow to CashFlowsFromUsedInFinancingActivities" order="2.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:label="CashFlowsFromUsedInInvestingActivities" xlink:title="CashFlowsFromUsedInInvestingActivities" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OrganicCashFlow" xlink:to="CashFlowsFromUsedInInvestingActivities" xlink:title="definition: OrganicCashFlow to CashFlowsFromUsedInInvestingActivities" order="2.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:label="CashFlowsFromUsedInOperatingActivities" xlink:title="CashFlowsFromUsedInOperatingActivities" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OrganicCashFlow" xlink:to="CashFlowsFromUsedInOperatingActivities" xlink:title="definition: OrganicCashFlow to CashFlowsFromUsedInOperatingActivities" order="2.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:label="PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:title="PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_IncreaseDecreaseInPayablesRelatedToPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill" xlink:label="IncreaseDecreaseInPayablesRelatedToPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill" xlink:title="IncreaseDecreaseInPayablesRelatedToPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets" xlink:to="IncreaseDecreaseInPayablesRelatedToPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill" xlink:title="definition: PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets to IncreaseDecreaseInPayablesRelatedToPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill" order="1.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RevenueFromRenderingOfTelecommunicationServices" xlink:label="RevenueFromRenderingOfTelecommunicationServices" xlink:title="RevenueFromRenderingOfTelecommunicationServices" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_RevenueFromConvergentServices" xlink:label="RevenueFromConvergentServices" xlink:title="RevenueFromConvergentServices" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="RevenueFromRenderingOfTelecommunicationServices" xlink:to="RevenueFromConvergentServices" xlink:title="definition: RevenueFromRenderingOfTelecommunicationServices to RevenueFromConvergentServices" order="1.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RevenueFromRenderingOfMobileTelephoneServices" xlink:label="RevenueFromRenderingOfMobileTelephoneServices" xlink:title="RevenueFromRenderingOfMobileTelephoneServices" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="RevenueFromConvergentServices" xlink:to="RevenueFromRenderingOfMobileTelephoneServices" xlink:title="definition: RevenueFromConvergentServices to RevenueFromRenderingOfMobileTelephoneServices" order="2.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RevenueFromSaleOfTelecommunicationEquipment" xlink:label="RevenueFromSaleOfTelecommunicationEquipment" xlink:title="RevenueFromSaleOfTelecommunicationEquipment" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="RevenueFromConvergentServices" xlink:to="RevenueFromSaleOfTelecommunicationEquipment" xlink:title="definition: RevenueFromConvergentServices to RevenueFromSaleOfTelecommunicationEquipment" order="2.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OperatingExpense" xlink:label="OperatingExpense" xlink:title="OperatingExpense" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_DirectCosts" xlink:label="DirectCosts" xlink:title="DirectCosts" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OperatingExpense" xlink:to="DirectCosts" xlink:title="definition: OperatingExpense to DirectCosts" order="1.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherExpenseByNature" xlink:label="OtherExpenseByNature" xlink:title="OtherExpenseByNature" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_IndirectCosts" xlink:label="IndirectCosts" xlink:title="IndirectCosts" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherExpenseByNature" xlink:to="IndirectCosts" xlink:title="definition: OtherExpenseByNature to IndirectCosts" order="1.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherCurrentNonfinancialAssets" xlink:label="OtherCurrentNonfinancialAssets" xlink:title="OtherCurrentNonfinancialAssets" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_ContractAssetsAndAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersCurrent" xlink:label="ContractAssetsAndAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersCurrent" xlink:title="ContractAssetsAndAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersCurrent" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="OtherCurrentNonfinancialAssets" xlink:to="ContractAssetsAndAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersCurrent" xlink:title="definition: OtherCurrentNonfinancialAssets to ContractAssetsAndAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersCurrent" order="1.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentContractAssets" xlink:label="CurrentContractAssets" xlink:title="CurrentContractAssets" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ContractAssetsAndAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersCurrent" xlink:to="CurrentContractAssets" xlink:title="definition: ContractAssetsAndAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersCurrent to CurrentContractAssets" order="2.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:label="CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:title="CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_CurrentPayablesOnTaxesOtherThanIncomeTax" xlink:label="CurrentPayablesOnTaxesOtherThanIncomeTax" xlink:title="CurrentPayablesOnTaxesOtherThanIncomeTax" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:to="CurrentPayablesOnTaxesOtherThanIncomeTax" xlink:title="definition: CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax to CurrentPayablesOnTaxesOtherThanIncomeTax" order="1.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:label="IncreaseDecreaseInWorkingCapital" xlink:title="IncreaseDecreaseInWorkingCapital" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_AdjustmentsForIncreaseDecreaseInCustomerContractAssets" xlink:label="AdjustmentsForIncreaseDecreaseInCustomerContractAssets" xlink:title="AdjustmentsForIncreaseDecreaseInCustomerContractAssets" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="IncreaseDecreaseInWorkingCapital" xlink:to="AdjustmentsForIncreaseDecreaseInCustomerContractAssets" xlink:title="definition: IncreaseDecreaseInWorkingCapital to AdjustmentsForIncreaseDecreaseInCustomerContractAssets" order="1.0" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_AdjustmentsForIncreaseDecreaseInCustomerContractLiabilities" xlink:label="AdjustmentsForIncreaseDecreaseInCustomerContractLiabilities" xlink:title="AdjustmentsForIncreaseDecreaseInCustomerContractLiabilities" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="IncreaseDecreaseInWorkingCapital" xlink:to="AdjustmentsForIncreaseDecreaseInCustomerContractLiabilities" xlink:title="definition: IncreaseDecreaseInWorkingCapital to AdjustmentsForIncreaseDecreaseInCustomerContractLiabilities" order="1.0" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_AdjustmentsForIncreaseDecreaseInOtherAssetsAndDecreaseIncreaseInOtherLiabilities" xlink:label="AdjustmentsForIncreaseDecreaseInOtherAssetsAndDecreaseIncreaseInOtherLiabilities" xlink:title="AdjustmentsForIncreaseDecreaseInOtherAssetsAndDecreaseIncreaseInOtherLiabilities" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="IncreaseDecreaseInWorkingCapital" xlink:to="AdjustmentsForIncreaseDecreaseInOtherAssetsAndDecreaseIncreaseInOtherLiabilities" xlink:title="definition: IncreaseDecreaseInWorkingCapital to AdjustmentsForIncreaseDecreaseInOtherAssetsAndDecreaseIncreaseInOtherLiabilities" order="1.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInOtherAssets" xlink:label="AdjustmentsForDecreaseIncreaseInOtherAssets" xlink:title="AdjustmentsForDecreaseIncreaseInOtherAssets" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="AdjustmentsForIncreaseDecreaseInOtherAssetsAndDecreaseIncreaseInOtherLiabilities" xlink:to="AdjustmentsForDecreaseIncreaseInOtherAssets" xlink:title="definition: AdjustmentsForIncreaseDecreaseInOtherAssetsAndDecreaseIncreaseInOtherLiabilities to AdjustmentsForDecreaseIncreaseInOtherAssets" order="2.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInOtherLiabilities" xlink:label="AdjustmentsForIncreaseDecreaseInOtherLiabilities" xlink:title="AdjustmentsForIncreaseDecreaseInOtherLiabilities" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="AdjustmentsForIncreaseDecreaseInOtherAssetsAndDecreaseIncreaseInOtherLiabilities" xlink:to="AdjustmentsForIncreaseDecreaseInOtherLiabilities" xlink:title="definition: AdjustmentsForIncreaseDecreaseInOtherAssetsAndDecreaseIncreaseInOtherLiabilities to AdjustmentsForIncreaseDecreaseInOtherLiabilities" order="2.0" />
<loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_MiscellaneousOtherOperatingExpense" xlink:label="MiscellaneousOtherOperatingExpense" xlink:title="MiscellaneousOtherOperatingExpense" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_OtherDirectCosts" xlink:label="OtherDirectCosts" xlink:title="OtherDirectCosts" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="MiscellaneousOtherOperatingExpense" xlink:to="OtherDirectCosts" xlink:title="definition: MiscellaneousOtherOperatingExpense to OtherDirectCosts" order="1.0" />
<loc xlink:type="locator" xlink:href="5493007JS0ZHJVBUWP18-2021-12-31.xsd#obel_OtherInformationTechnologyAndNetworkExpenses" xlink:label="OtherInformationTechnologyAndNetworkExpenses" xlink:title="OtherInformationTechnologyAndNetworkExpenses" />
<definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="MiscellaneousOtherOperatingExpense" xlink:to="OtherInformationTechnologyAndNetworkExpenses" xlink:title="definition: MiscellaneousOtherOperatingExpense to OtherInformationTechnologyAndNetworkExpenses" order="1.0" />
</definitionLink>
</linkbase>