/ Dictionary / Index S sulfur dye: Meaning and Definition of Find definitions for: sul'fur dye" Pronunciation: [key] — Chem. Chem. any of the class of dyes produced by heating an organic compound, as an indophenol, with sulfur or sodium polysulfide, used chiefly in dyeing cotton. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sulfur dioxide sulfureous Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language