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English definition of “obligation”

obligation

noun uk   /ˌɒb.lɪˈɡeɪ.ʃən/ us    /ˌɑː.blə-/
B2 [C or U] the fact that you are obliged to do something: [+ to infinitive] If you have not signed a contract, you are under no obligation to (= it is not necessary to) pay them any money. You have a legal obligation to (= the law says you must) ensure your child receives a proper education. [C] something that you must do: I don't have time to do his work for him - I've got too many obligations as it is.
(Definition of obligation from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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