Etymology
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unplug (v.)

1775, from un- (2) "reverse, opposite of" + plug (v.). Related: Unplugged; unplugging.

updated on February 28, 2014

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Definitions of unplug from WordNet

unplug (v.)
pull the plug of (electrical appliances) and render inoperable;
unplug the hair dryer after using it
Synonyms: disconnect
From wordnet.princeton.edu, not affiliated with etymonline.