What is full form of ok in english? (Okay, ok or O.K.)

What is full form of ok in english? (Okay, ok or O.K.)

O.K. : Oll Korrect or Olla kalla (means All Correct)
Ok (spelled variations include okay, ok or O.K.) is the most currently spoken and written word on the Earth. Ok is an American English word, which denotes agree, acceptance, approval, agreement, acknowledgment, assent or sign of indifference.

How we use 'ok' in our daily life?

Ok as an adjective, it simply uses as bad or good
As an adverb, it fulfills a similar role
As an interjection, it defines compliance or agreement
As a noun, it means assent
Or as a verb, more colloquially
It is also used as appropriate voice tone to show doubt or to seek confirmation.

How 'ok' used in gestures?

In US (United States) and Europe gesture of ok is made by touching the index finger with the thumb (creating rough circle) and the raising of the remaining 3 finger as shown in the image,
This type of gestures have different meaning in other cultures, some aggression, some religious.




Reference - Wikipedia