OK

OK¹

(also okay) informal

exclamation

1》 expressing agreement or acquiescence.

2》 introducing an utterance.

adjective

1》 satisfactory; fairly good.

2》 permissible.

adverb in a satisfactory manner or to a satisfactory extent.

noun an authorization or approval.

verb (OK's, OK'ing, OK'd) give approval to.

Word History

The exclamation OK is first recorded in the mid 19th century. It is most probably an abbreviation of orl korrect, a humorous form of all correct, which was popularized as a slogan during US President Martin Van Buren's re-election campaign of 1840. The initials also represented his nickname Old Kinderhook, derived from his birthplace, Kinderhook in New York State.

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OK²

abbreviation Oklahoma (in official postal use).