/ Dictionary / Index S symphony orchestra: Meaning and Definition of Find definitions for: sym'phony or"chestra Pronunciation: [key] a large orchestra composed of wind, string, and percussion instruments and organized to perform symphonic compositions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. symphony symphysial Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language