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Meaning of high-definition television

high'-def•i•ni'tion tel'evision

Pronunciation: (hī'def"u-nish'un), [key]
  1. a television system having twice the standard number of scanning lines per frame and producing a sharper image, and greater picture detail. Abbr.: HDTV
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.