okay >> /ˌəˈkæɪ/
Definition: [noun] Endorsement; approval.
Example: We can start as soon as we get the OK.
Definition: [verb] To approve.
Example: I don't want to OK this amount of money.
Definition: [verb] To confirm by activating a button marked OK.
Definition: [adjective] All right, permitted.
Example: Do you think it's OK to stay here for the night?
Definition: [adjective] Satisfactory, reasonably good; not exceptional.
Example: The soup was OK, but the dessert was excellent.
Definition: [adjective] In good health or a good emotional state.
Example: He's not feeling well now, but he should be OK after some rest.
Definition: [adverb] Satisfactorily, sufficiently well.
Example: The team did OK in the playoffs.
Definition: [interjection] Used to indicate acknowledgement or acceptance.
Example: I promise to give it back. – OK.
Definition: [interjection] Used to introduce a sentence in order to draw attention to the importance of what is being said.
Example: OK, I'm thinking of a number…
Definition: [interjection] Used in turn-taking, serving as a request to the speaker to grant the turn to the interrupter.
Example: You always do this to me! When we were at your mother’s, you said that… – OK, OK, …