/ Dictionary / Index S sulfide: Meaning and Definition of Find definitions for: sul•fide Pronunciation: (sul'fīd, -fid), [key] — n. Chem. a compound of sulfur with a more electropositive element or, less often, a group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sulfide (Thesaurus) sulfhydryl sulfide dye Related Content Daily Word Quiz: divulge Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language