Emily Dickinson Lexicon

SYM'PHO-NY, n. [L. symphonia; Fr. symphonie; Gr. συμφωνια; συν, with, and φωνη, voice.]

1. A consonance or harmony of sounds, agreeable to the ear, whether the sounds are vocal or instrumental, or both. The trumpets sound, / And warlike symphony is heard around. – Dryden.
2. A musical instrument, mentioned by French writers.
3. A full concert.
4. An overture or other composition for instruments.