/ Dictionary / Index B BM: Meaning and Definition of Find definitions for: BM Pronunciation: [key] basal metabolism. bench mark. black male. bowel movement. B.M. Pronunciation: [key] Bachelor of Medicine. Bachelor of Music. British Museum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bm (Thesaurus) Blytheville B.Mar.E. Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language