/ Dictionary / Index R rifampin: Meaning and Definition of Find definitions for: ri•fam•pin Pronunciation: (ri-fam'pin), [key] — n. Pharm. a semisynthetic broad-spectrum antibiotic, CHNO, used in the treatment of pulmonary tuberculosis, asymptomatic carriers of meningococcal disease, and leprosy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rifampin (Thesaurus) Rifa&ain;iya rife Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language