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 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 ...

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.

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 ...

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 gesture is now a hate symbol, according to a new report by the Anti-Defamation League. The ADL added that symbol along with several others on Thursday to its long-standing database of ...