The word "tweet" has been around for quite some time, as it historically refers to that whistling sound some birds do. However, the Oxford English Dictionary is now adding it as a noun and verb, describing it as meaning "to post (a message, item of information, etc.) on Twitter."
In the OED's latest update on the new additions to its massive list of words, the arbiters of the Queen's English said: "The noun and verb tweet (in the social-networking sense) has just been added to the OED. This breaks at least one OED rule, namely that a new word needs to be current for ten years before consideration for inclusion. But it seems to be catching on." [OED via The Register]
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