/ Dictionary / Index B B.N.S.: Meaning and Definition of Find definitions for: B.N.S. Pronunciation: [key] Bachelor of Naval Science. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bns (Thesaurus) BND B/o 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