- an expression of approval, agreement, etc
- in good or satisfactory condition
- permissable: is it O.K. if I go home now?
- acceptable but not outstanding: the party was O.K.
- (transitive) to approve or endorse
- approval or agreement
Also: OK, o.k., okay Etymology: 19th Century: perhaps from o(ll) k(orrect), jocular alteration of all correct