/ Dictionary / Index B blackback flounder: Meaning and Definition of Find definitions for: black'back floun'der Pronunciation: (blak'bak"). [key] See under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. black-backed gull black-bag Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language