OK is commonly rendered in upper case and without punctuation: OK, rather than O.K. or Okay. The OK button can probably be traced to user interface research done for the Apple Lisa.

The meaning of OK is all right. How to use OK in a sentence.

OKAY definition: a variant of OK. See examples of okay used in a sentence.

You can say ' Okay? ' to check whether the person you are talking to understands what you have said and accepts it.

Okay is used as an adverb in informal speech, meaning ‘all right’, ‘neither well nor badly’: …

She's an OK [= fair] player. He's okay [=he is not bad] at math, but he really likes history. The movie was just OK.

Dec 8, 2025 · Okay vs Ok: what’s correct? This student-friendly grammar guide explains spelling, usage, examples, rules, and exercises for English learners.