/ Dictionary / Index D dB: Meaning and Definition of Find definitions for: dB Pronunciation: [key] — Physics. Physics. decibel; decibels. DB Pronunciation: [key] — Radio and Television. Radio and Television. delayed broadcast. D.B. Pronunciation: [key] Bachelor of Divinity. Domesday Book. d.b. Pronunciation: [key] daybook. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: db (Thesaurus) dazzle d/b/a Related Content Daily Word Quiz: garrulous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language