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 ...

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 ...

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

"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 ...

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." ...

From Buenos Aires to Bangkok, Montreal to Moscow, the languages may differ, but nearly every taxi driver or street vendor in the world understands one word made famous during a raucous U.S.

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 ...

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 ...

Barack Obama has done it. So have Oprah Winfrey, Ronald Reagan, Malcolm of “Malcolm in the Middle” and Beyoncé. But flashing the OK hand signal, in which the thumb and index fingers form a circle, has ...

When news breaks, you need to understand what actually matters. At Vox, our mission is to help you make sense of the world — and that work has never been more vital. But we can’t do it on our own. We ...

Back in 1963, when the term “baby-boomer” was first published in a Salt Lake Tribune article, it carried just one definition: a person born during the tail end or in the decade after World War II, ...