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Meaning of aperture-priority

ap•er•ture-pri•or•i•ty

Pronunciation: (ap'ur-chur prī-or"i-tē, -ôr"-), [key]
— adj. Photog.
  1. of or pertaining to a semiautomatic exposure system in which the photographer presets the aperture and the camera selects the shutter speed.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.