Tweet is now an official word in the English language. The Oxford English Dictionary (OED), the official arbiter of such things, has formally recognized the act of tweeting both as a noun and a verb.
The word “tweet” has already been in the dictionary since 1851 or before. Until now, it officially meant bird calls. With the latest update, the meaning has expanded to mean the act of tweeting. The official definition reads: “To make a posting on the social networking service Twitter. Also: to use Twitter regularly or habitually.”
OED Chief Editor John Simpson declared the update in his June 2013 update. The update is, however, marked as a “quiet” one. The reason cited was that the inclusion has violated at least one rule for such actions – a word has to be current for 10 years. The authority decided to break to rule because “it seems to be catching on.”
One interesting fact is that the word “retweet” was included in the dictionary back in 2011. That must have broken the above mentioned rule too.
Apart from the word “tweet”, OED has also included the words “crowdsourcing,” “mouseover,” “e-reader” and “re-direct.”