/ Dictionary / Index D dumbhead: Meaning and Definition of Find definitions for: dumb•head Pronunciation: (dum'hed"), [key] — n. Slang. blockhead. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dumbfound dumbo Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language