high-definition television(redirected from Hi def)
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high-definition television[¦hī def·ə¦nish·ən ′tel·ə‚vizh·ən]
A television system with a resolution of more than 1000 scan lines, as compared to 525-625 scan lines in conventional systems. Abbreviated HDTV.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.