/ Dictionary / Index S synergy: Meaning and Definition of Find definitions for: syn•er•gy Pronunciation: (sin'ur-jē), [key] — pl. -gies. combined action or functioning; synergism. the cooperative action of two or more muscles, nerves, or the like. the cooperative action of two or more stimuli or drugs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: synergy (Thesaurus) synergistic synesis Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language