OK, adj., int.1, n.2, and adv.
α. 1800s– O.K., 1800s– OK, 1800s– o.k., 1900s– ok.
β. 1800s– okay, 1900s– okeh, 1900s– okey.
(Show Less)1. All correct, all right; satisfactory, good; well, in good health or order. In early use, occasionally more intensively: outstanding, excellent. Now frequently in somewhat weakened sense: adequate, acceptable. OK by (someone) : fine by (a person), acceptable to (a person). Chiefly predicative.
1839—2000(Hide quotations)
2. Fashionable, modish; prestigious, high-class.
1869—1983(Hide quotations)
3. Of a person: decent, trustworthy; congenial.
1871—2000(Hide quotations)
4. Appropriate, suitable; permissible, allowed. Frequently with for.
1925—2000(Hide quotations)
5. Of a person: comfortable, at ease, content, satisfied; reasonable, understanding. Usually with about, with.
1978—2002(Hide quotations)
1. Expressing assent, concession, or approval, esp. with regard to a previous statement or question: yes, all right.
1839—1993(Hide quotations)
a. Appended as an interrogative to a clause, phrase, etc., in expectation of agreement or approval.
1929—1999(Hide quotations)
b. British. —— rules OK! : asserting the pre-eminence of a specified person or thing. Also with plural agreement —— rule OK!
1972—2002(Hide quotations)
3. Introducing an utterance or as a conversational filler, typically without affirmative or concessive force, but rather as a means of drawing attention to what the speaker is about to say: well, so, right.
1933—1994(Hide quotations)
An indication of approval; an endorsement, authorization. Frequently in to give the OK (to) .In early use chiefly with reference to the marking of a document, etc., with the letters ‘OK’.
1841—1991(Hide quotations)
Satisfactorily, acceptably.
1886—1989(Hide quotations)