/ ˈsɪmfəni; NAmE / noun
( pl. -ies ) a long complicated piece of music for a large orchestra , in three or four main parts (called movements ) :
Beethoven's Fifth Symphony
► sym·phon·ic / sɪmˈfɒnɪk; NAmE -ˈfɑːn-/ adjective :
Mozart's symphonic works
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WORD ORIGIN
Middle English (denoting any of various instruments such as the dulcimer): from Old French symphonie , via Latin from Greek sumphōnia , from sumphōnos harmonious, from sun- together + phōnē sound.