OK - definition and synonyms

verb [transitive] informal 

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/ˌəʊˈkeɪ/
present tense
I/you/we/theyOK
he/she/itOK’s
present participleOK’ing
past tenseOK’d
past participleOK’d
  1. to give permission or approval for something to happen

    When he’s OK’d the trip, I’ll book the tickets.