Definitions of O.K.
  1. adverb
    in a satisfactory or adequate manner
    synonyms: all right, alright, okay
  2. noun
    an endorsement
    “they gave us the O.K. to go ahead”
    synonyms: OK, okay, okeh, okey
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    type of:
    countenance, endorsement, imprimatur, indorsement, sanction, warrant
    formal and explicit approval
  3. verb
    give sanction to
    synonyms: approve, okay, sanction
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    disapprove, reject
    deem wrong or inappropriate
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    give religious sanction to, such as through on oath
    approve officially
    back, endorse, indorse, plump for, plunk for, support
    be behind; approve of
    support a person for a position
    guarantee, warrant
    stand behind and guarantee the quality, accuracy, or condition of
    champion, defend
    protect or fight for as a champion
    type of:
    authorise, authorize, clear, pass
    grant authorization or clearance for
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