- S: (n) Oklahoma, Sooner State, OK (a state in south central United States)
- S: (n) O.K., OK, okay, okey, okeh (an endorsement) "they gave us the O.K. to go ahead"
- S: (adj) all right, fine, o.k., ok, okay, hunky-dory (being satisfactory or in satisfactory condition) "an all-right movie"; "the passengers were shaken up but are all right"; "is everything all right?"; "everything's fine"; "things are okay"; "dinner and the movies had been fine"; "another minute I'd have been fine"
AdverbS: (adv) very well, fine, alright, all right, OK (an expression of agreement normally occurring at the beginning of a sentence)
Definition of 'ok' from Princeton's WordNet