/ Dictionary / Index D desulfur: Meaning and Definition of Find definitions for: de•sul•fur Pronunciation: (dē-sul'fur), [key] — v.t. to free from sulfur; desulfurize. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. desuetude desulfurate Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language