The New Oxford American Dictionary (Oxford University Press) has announced the winner of its annual "word of the year" contest: unfriend. In a post on Oxford University Press's Web site, Christine Lindberg, senior lexicographer for Oxford dictionaries, explained the choice. "In the online social networking context, its meaning is understood, so its adoption as a modern verb form makes this an interesting choice for Word of the Year. Most 'un-' prefixed words are adjectives (unacceptable, unpleasant), and there are certainly some familiar 'un-' verbs (uncap, unpack), but 'unfriend' is different from the norm. It assumes a verb sense of 'friend' that is really not used (at least not since maybe the 17th century!)." Oxford also released a list of some of the other words considered, including others that relate to digital communication (hashtag, sexting) and several related to current events (birther, death panel, teabagger).