/ Dictionary / Index S sulfate: Meaning and Definition of Find definitions for: sul•fate Pronunciation: (sul'fāt), [key] — n., v., -fat•ed, -fat•ing. —n. a salt or ester of sulfuric acid. —v.t. to combine, treat, or impregnate with sulfuric acid, a sulfate, or sulfates. to convert into a sulfate. to form a deposit of lead-sulfate compound on (the lead electrodes of a storage battery). —v.i. to become sulfated. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sulfate (Thesaurus) sulfatase sulfate paper Related Content Daily Word Quiz: innocuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language