Definitions for okˈoʊˈkeɪ, ˌoʊˈkeɪ, ˈoʊˌkeɪ

Random House Webster's College Dictionary

Oklahoma.

OKˈoʊˈkeɪ, ˌoʊˈkeɪ, ˈoʊˌkeɪ(adj.; adv.; n.)(pl.)OKs or OK's or O.K.'s or o•kays

or O.K. or o•kay

(adj.)all right; satisfactory:
Is everything OK?
Category: Common Vocabulary
correct, permissible, or acceptable.
Category: Common Vocabulary
feeling well.
Category: Common Vocabulary
safe; sound.
Category: Common Vocabulary
adequate but unremarkable.
Category: Common Vocabulary
estimable, likable, or dependable.
Category: Common Vocabulary
(adv.)all right; well enough; successfully; fine:
He sings OK.
Category: Common Vocabulary
(used to request or express agreement, acknowledgment, approval, etc.)
Category: Common Vocabulary
(n.)an approval, agreement, or endorsement.
Category: Common Vocabulary
(v.t.)to endorse or indicate approval of; authorize.
Category: Common Vocabulary

Origin of OK:

initials of a facetious folk phonetic spelling, e.g., oll or orl korrect representing all correct, first attested in Boston in 1839, then used in 1840 by Democrat partisans of Martin Van Buren, who allegedly named their organization, the O.K. Club, in allusion to the initials of Old Kinderhook, Van Buren's nickname, derived from his birthplace, Kinderhook, New York

Princeton's WordNet

Oklahoma, Sooner State, OK(noun)
a state in south central United States
O.K., OK, okay, okey, okeh(adj)
an endorsement
"they gave us the O.K. to go ahead"
all right, fine, o.k., ok, okay, hunky-dory(adverb)
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"
very well, fine, alright, all right, OK(adverb)
an expression of agreement normally occurring at the beginning of a sentence