/ Dictionary / Index P pinhead: Meaning and Definition of Find definitions for: pin•head Pronunciation: (pin'hed"), [key] — n. the head of a pin. something very small or insignificant. a stupid person; nitwit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pinhead (Thesaurus) pinguid pinheaded 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