high definition

high definition

noun
1.
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: HD See also high-definition television.
2.
an audio system that reproduces sound with a high degree of accuracy and clarity: music recordings that use high definition. Abbreviation: HD
3.
an optical system that produces very sharp images. Abbreviation: HD

Origin:
1980–85

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