2) Not good and not bad; decent, fine.
3) Alternate way for one to say that he/she likes something that may be considered 'uncool' to like. By saying that it is 'OK', he/she in no way makes a strong commitment to hteir interest, as 'OK' usually comes with connotations of 'better than expected' and 'not good, not bad.'
4) Postal abbreviation for Oklahoma.
2) It looked like a nasty fall, but Ferdinand emerged OK.
Mike: Do you like that webpage? It seems like a nerdy site.
Tom: Ahh...It's OK.
4) I live in Oklahoma City, OK.
"YES YES YES"!!!!
"the battle was ok no men killed"
In ancient greece, when they load ships with cargo, when tey check the cargo, (always placed in big vases,amphoreis), at the top of each vase, after sealing it they marked it with 2 letters. O K. that means Ola Kala.
everything is fine. so the vase was ready to "travel" in the cargo ship.
Many of those vases where found at greek shipwrecks in the deapths of seas, during ages.
But there are many other options, how the word ok was born, very intresting and worthly to investigate.