/ Dictionary / Index D dumbfound: Meaning and Definition of Find definitions for: dumb•found Pronunciation: (dum-found', dum'found"), [key] — v.t. to make speechless with amazement; astonish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dumbfound (Thesaurus) dumb-dumb dumbhead Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language