—adj. 1. all right; proceeding normally; satisfactory or under control: Things are OK at the moment. 2. correct, permissible, or acceptable; meeting standards: Is this suit OK to wear to a formal party? 3. doing well or in good health; managing adequately: She's been OK since the operation. 4. adequate but unexceptional or unremarkable; tolerable: The job they did was OK, nothing more. 5. estimable, dependable, or trustworthy; likable: an OK person.
—adv. 1. all right; well enough; successfully; fine: She'll manage OK on her own. He sings OK, but he can't tap dance. 2. (used as an affirmative response) yes; surely.
3. (used as an interrogative or interrogative tag) all right?; do you agree?
—interj. 1. (used to express agreement, understanding, acceptance, or the like): OK, I'll get it for you. 2. (used as an introductory or transitional expletive): OK, now where were we?
—n. an approval, agreement, or endorsement: They gave their OK to her leave of absence.
—v.t. to put one's endorsement on or indicate one's approval of (a request, piece of copy, bank check, etc.); authorize; initial: Would you OK my application?Also,O.K.,okay.