/ Dictionary / Index F flashbulb: Meaning and Definition of Find definitions for: flash•bulb Pronunciation: (flash'bulb"), [key] — n. Photog. a glass bulb, filled with oxygen and aluminum or zirconium wire or foil, which, when ignited electrically, burns with a brilliant flash to provide momentary illumination of a subject. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: flashbulb (Thesaurus) flashboard flash burn Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language