/ Dictionary / Index L lactate: Meaning and Definition of Find definitions for: lac•tate Pronunciation: (lak'tāt), [key] — -tat•ed, -tat•ing. to produce milk. lac•tate Pronunciation: (lak'tāt), [key] — n. Chem. an ester or salt of lactic acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lactate (Thesaurus) lactase lactate dehydrogenase Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language