OK is a term of approval, sometimes written phonetically as
okay, or extended to
okey dokey or even, thanks to
Ned Flanders,
okelly dokelly. Originally it was short for "Oll Korrect", a deliberate mispelling of "all correct", written by a professor for completed school papers he corrected. The first recorded use of "OK" was in the
Boston Morning Post[?] on
March 23,
1839. It has since become a
colloquial referent[?], used everyday among
English speakers, and borrowed by non-English speakers.