/ Dictionary / Index B bifunctional: Meaning and Definition of Find definitions for: bi•func•tion•al Pronunciation: (bī-fungk'shu-nl), [key] — adj. having or serving two functions. having or involving two functional groups. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Bifrost bifurcate Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language