OK

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"

an expression of agreement normally occurring at the beginning of a sentence

a state in south central United States

an endorsement; "they gave us the O.K. to go ahead"