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English definition of “OK”

OK

verb [T] (present tense OK's, present participle OK'ing, past tense and past participle OK'd) (also okay (present tense okays, present participle okaying, past tense and past participle okayed))     /ˌəʊˈkeɪ/ US  /ˌoʊ-/ informal
to agree to something: Have the committee OK'd your proposal ?Accepting and agreeingAccepting and agreeing reluctantlyApproving and approval
(Definition of OK verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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