What is the full form of OK

OK: Olla Kalla or Oll Korrect

OK (also spelled as okay, ok, or O.K.) is a word used to denote acceptance, agreement, approval, or acknowledgment. OK expand as Olla Kalla. It is a Greek word which means All correct. This is a very common word used in conversation when we agree with the other. It is also used in chatting.

For example:

Person 1: Hi
Person 2: Hi
Person 1: How are you?
Person 2: ok
.
.
.
.
Chat goes on..
Person 1: I am going to market.
Person 2: ok
Chat end.