highdefinition tele vision's

high-def·i·ni·tion tel·evision

[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

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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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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00:10
Highdefinition tele vision's is always a great word to know.
So is doohickey. Does it mean:
a gadget; dingus; thingumbob.
a chattering or flighty, light-headed person.
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