/ Dictionary / Index S sulfa: Meaning and Definition of Find definitions for: sul•fa Pronunciation: (sul'fu), [key] — Pharm. Pharm. —adj. related chemically to sulfanilamide. pertaining to, consisting of, or involving a sulfa drug or drugs. —n. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sulfa (Thesaurus) sulf- sulfadiazine Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language