Etymology
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TV (n.)

1948, shortened form of television (q.v.). Spelled out as tee-vee from 1949. TV dinner (1954), made to be eaten from a tray while watching a television set, is a proprietary name registered by Swanson & Sons, Omaha, Nebraska, U.S.

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Definitions of TV

tv (n.)
broadcasting visual images of stationary or moving objects; "Television is a medium because it is neither rare nor well done" - Ernie Kovacs;
Synonyms: television / telecasting / video
tv (n.)
an electronic device that receives television signals and displays them on a screen;
the British call a tv set a telly
Synonyms: television receiver / television / television set / tv set / idiot box / boob tube / telly / goggle box
From wordnet.princeton.edu