/ Dictionary / Index D dimwit: Meaning and Definition of Find definitions for: dim•wit Pronunciation: (dim'wit"), [key] — n. Slang. a stupid or slow-thinking person. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dimwit (Thesaurus) dim sum din Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language