O.K. is a pair of initials with a multitude of uses -- not to mention a number of different explanations of how it came to be. An upcoming anniversary is the occasion for Mo Rocca to investigate: Word ...

OK is one of the most frequently used words in the English language, but does it have a Greek origin? There are numerous ...

You might be surprised to learn which came first! When you’re expressing assent to something, or conveying that you’re all right, in writing or text, do you use “OK” or “okay”? Chances are you’ve used ...

What’s the difference between “OK” “Ok” “OK!” “K” and “kk”? They all communicate the same thing–yes, all right–but some of them may cause unintended offense to Millennial and Gen-Zers in the workplace ...

"OK" is the all-purpose American expression that became an all-purpose English expression that became an all-purpose expression in dozens of other languages. It can be an enthusiastic cheer (A parking ...

It crops up in our speech dozens of times every day, although it apparently means little. So how did the word "OK" conquer the world, asks Allan Metcalf. "OK" is one of the most frequently used and ...

Russell McLendon is a science writer with expertise in the natural environment, humans, and wildlife. He holds degrees in journalism and environmental anthropology. OK, so you're familiar with "OK." ...

OK, it's quiz time: You probably say it dozens of times every day. It may be the most widely used expression in the world. And yet it's so simple. OK, ready for the answer? That's it -- the word "OK." ...

The OK hand sign has been added to a list of hate symbols. The finger-and-thumb gesture - which is also a popular emoji - is being used by some as a "sincere expression of white supremacy", according ...