high definition tele vision's

high-definition television

[hahy-def-uh-nish-uhn]
noun
a television system having twice the standard number of scanning lines per frame and producing a sharper image, and greater picture detail. Abbreviation: HDTV

Origin:
1980–85

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
high-definition television

noun
a television system that has more than the usual number of lines per frame so its pictures show more detail 
WordNet® 3.0, © 2006 by Princeton University.
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