The full form of OK is Olla Kalla or Oll Korrect.
- Introduced in the 18th century the term OK (Olla Kalla), is a Greek word that means 'All Correct'/ 'All Good'.
- OK (also spelled as Okay, O.K, or ok), is an English word used to indicate acceptance, approval, agreement, support, or acknowledgment.
- OK is usually used as a loanword in other languages too.
- Ok is generally used in a conversation or while chatting when we agree with the other.
Trivia: The term OK gained popularity in 1840 presidential campaign of Martin Van Buren. He used "Vote for OK" as his campaign slogan. Van Buren was nicknamed "Old Kinderhook" as his birthplace was in Kinderhook, New York.