/ Dictionary / Index A aperture-priority: Meaning and Definition of Find definitions for: ap•er•ture-pri•or•i•ty Pronunciation: (ap'ur-chur prī-or"i-tē, -ôr"-), [key] — adj. Photog. 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. aperture mask aperture ratio Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language