Definition of: symphony

(sim′fə·nē) noun plural ·nies
1. A harmonious or agreeable mingling of sounds, whether vocal, instrumental, or both; figuratively, any concord or agreeable blending: symphonies in gray.
2. Music A composition for orchestra, consisting usually of four movements, of which one or more generally follow sonata form, and which are of diverse individuality united by homogeneous elements.
3. A symphony orchestra. [<OF simphonie <L symphonia <Gk. symphōnia <syn- together + phōnē a sound]