OK; okay
1. adjective
1
comfortable, at ease. Especially common as 'OK about' or 'OK with' US, 1978.
2
safe, unhurt US, 1839.
3
decent, mediocre, satisfactory. In 1963, the late Allen Walker Read published his extensive and definitive research on the term, tracing its coinage to 1839 as an abbreviation of 'oil korrect', itself a then-popular slang term US, 1839
2. noun
1
consent, approval US, 1841.
2
a bribe paid by an illegal gambling establishment to the authorities to stay in business US, 1979
3. verb
to approve US, 1988
4. used for expressing assent, approval, understanding, or agreement US, 1839