Breadcrumb Home > Dictionary > Index S surfactant: Meaning and Definition of Find definitions for: sur•fac•tant Pronunciation: (sur-fak'tunt), [key] — n. Chem. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: surfactant (Thesaurus) surfacing surf and turf ✖ Related Content Daily Word Quiz: hegira Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language