OK full form is All Correct.
It means "Everything is fine", but
it is also spelled ok, ok or ok. This is a very common word when we agree in
conversation.
Okay (OK) it is a colloquial word in English
that denotes approval, acceptance, assent, or acknowledgment. OK is probably
short for "Oll Korrect", a humorous misspelling of "All
Right" that needs a bit of historical context to make sense.