/ Dictionary / Index D dunderhead: Meaning and Definition of Find definitions for: dun•der•head Pronunciation: (dun'dur-hed"), [key] — n. a dunce; blockhead; numbskull. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dunderhead (Thesaurus) dunder dundrearies Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language