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