/ Dictionary / Index B B.S.Arch.: Meaning and Definition of Find definitions for: B.S.Arch. Pronunciation: [key] Bachelor of Science in Architecture. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bsarch (Thesaurus) B.S.A.E. B.S.Art.Ed. Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language