- a system for screen display of images that are sharper and more detailed than normal, having many more than the standard number of scanning lines per frame: Most TV shows are available in high definition. Abbreviation: HDSee also high-definition television.
- an audio system that reproduces sound with a high degree of accuracy and clarity: music recordings that use high definition.Abbreviation: HD
- an optical system that produces very sharp images. Abbreviation: HD
Origin of high definition
First recorded in 1980–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for high definition
The team was not able to view the high-definition images on board the ship.Amelia Earhart: New Documentary Searches Underwater for Pilot and Her Plane
August 17, 2012
I was quite teary when I saw in high-definition my therapy revelation with Dr. Sealy.Is Dr. Drew a Phony?
December 17, 2009
A massive part of the profit from the concerts would have come from the high-definition video taken at each performance.Don't Be Fooled—This Isn't It
October 31, 2009