'Tweet,' 'geekery,' ‘crowdsourcing’ make The Oxford English Dictionary

The word "tweet" (in the featherless sense) has been added to the Oxford English Dictionary, together with a batch of other tech-y words such as "geekery," "crowdsourcing" and "e-reader," http://www.npr.org reports. 

OED chief editor John Simpson writes that adding tweet "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." Another entry is "dad dancing," which is defined as an "awkward, unfashionable, or unrestrained style of dancing to pop music, as characteristically performed by middle-aged or older men."