/ Dictionary / Index P pinhole: Meaning and Definition of Find definitions for: pin•hole Pronunciation: (pin'hōl"), [key] — n. a small hole made by or as by a pin. a hole for a pin to go through; tiny aperture. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pinhole (Thesaurus) pinheaded pinhole camera Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language