/ Dictionary / Index B B.S.E.S.: Meaning and Definition of Find definitions for: B.S.E.S. Pronunciation: [key] Bachelor of Science in Engineering Sciences. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bses (Thesaurus) B.S.E.P. B.S.F. 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