/ Dictionary / Index D D.N.B.: Meaning and Definition of Find definitions for: D.N.B. Pronunciation: [key] — Brit. Brit. Dictionary of National Biography. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. DNA virus Dnepr Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language