/ Dictionary / Index P pinhole camera: Meaning and Definition of Find definitions for: pin'hole cam"era Pronunciation: [key] a simple camera in which an aperture provided by a pinhole in an opaque diaphragm is used in place of a lens. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pinhole pinion Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language