/ Dictionary / Index I instant camera: Meaning and Definition of Find definitions for: in'stant cam'era Pronunciation: [key] a usually portable camera that produces a finished picture shortly after each exposure. Cf. Polaroid (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. instantaneous sound pressure instanter Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language