/ Dictionary / Index B Bornu: Meaning and Definition of Find definitions for: Bor•nu Pronunciation: (bôr'n), [key] — n. a former sultanate in Africa, SW of Lake Chad: now largely a province in Nigeria. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bornite bornyl acetate 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