/ Dictionary / Index D dumbbell: Meaning and Definition of Find definitions for: dumb•bell Pronunciation: (dum'bel"), [key] — n. a gymnastic apparatus consisting of two wooden or metal balls connected by a short bar serving as a handle, used as a weight for exercising. a stupid person. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dumbbell (Thesaurus) dumb barter Dumbbell nebula 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