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English definition of “OK”

OK

exclamation, adjective [not gradable] (AGREED) (also okay)    /ˈoʊˈkeɪ, ˌoʊˈkeɪ, ˈoʊˌkeɪ/
agreed or acceptable ; all right : Is it OK if I bring a friend to the party ? "Will you lend me ten bucks ?" "OK." OK (singular OK's, present participle OK'ing or okaying, past tense and past participle OK'd or okayed) (also okay)    /ˈoʊˈkeɪ, ˌoʊˈkeɪ, ˈoʊˌkeɪ/ verb [T] Did the boss OK your proposal ?
(Definition of OK exclamation, adjective (AGREED) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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