The word OK is pretty much everywhere, from simple conversations to user interfaces and even as a gesture:


That makes me wonder: how informal is the word "OK"? For instance, would it be appropriate in a legal document?

  • OK is not used in writing. It is speech. So, in legal writing, it would be fine for a quote but not otherwise.
    – Lambie
    Commented Feb 14, 2021 at 17:16
  • @Lambie But you just wrote it!
    – stangdon
    Commented Feb 14, 2021 at 18:44
  • @stangdon Oh, I should go into the garden and eat worms because I didn't say it in a way that would be acceptable to Your Reverence.
    – Lambie
    Commented Feb 15, 2021 at 14:43

1 Answer 1


"OK" is not considered a formal word. It can be used sometimes in formal conversations, but not in writing. Some words you can use in its place are "acceptable", "all right", or "decent". It mostly depends on the context. If you look up synonyms for "OK", you can find a lot more ways to say it. There are a lot of informal synonyms. Some of the more informal ones that you should steer clear of are "cool", "hip", and "A-OK".

  • 2
    Pretty good answer, although I would say that 'alright' is not always considered correct, so in a formal written context I would definitely recommend 'all right' over it. Source writersdigest.com/online-editor/alright-vs-all-right
    – jfhc
    Commented Aug 15, 2014 at 15:17
  • 1
    That's interesting, I didn't know alright wasn't standard! I edited my answer, thanks!
    – TheIntern
    Commented Aug 15, 2014 at 15:25

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