/ Dictionary / Index S sulfonamide: Meaning and Definition of Find definitions for: sul•fon•a•mide Pronunciation: (sul-fon'u-mīd", -mid, sul"fu-nam'īd, -id), [key] — n. Pharm. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sulfonamide (Thesaurus) sulfo group sulfonate Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language