/ Dictionary / Index P pinheaded: Meaning and Definition of Find definitions for: pin•head•ed Pronunciation: (pin'hed"id), [key] — adj. stupid or foolish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pinhead pinhole 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