Okay is more than likely the most commonly used word in the world so surely we most know where it came from.
There are dozens of explanations on the internet as to the possible origin of the term OK and although most sound feasible such as OK is KO spelled backwards and the Greek expression Ola Kala which translates as Everything’s Fine, I’m not sure that I’d go with any of them without knowing a little more.
So what do visitors to this site have to say about it?

In the Choctaw language, there is a word “okeh” which has the same meaning and pronunciation as in American usage and I’d find that explanation real easy to go with.
Many of the frontiersmen of the early 19th Century, including eventual American Presidents Andrew Jackson and William Henry Harrison were familiar with the language and Woodrow Wilson used the okey spelling in order to emphasize the Native American origins of the word.
* The Choctaws are an American Indian tribe that formerly inhabited Mississippi but now resides in Oklahoma.
Hmm that’ right the word “OK” is universal and there are only one meaning with that word. Nice to know this kind of thing.