sym ‧ pho ‧ ny /ˈsɪmfəni/ BrE AmE noun ( plural symphonies ) [countable]
[ Date: 1200-1300 ; Language: Old French ; Origin: symphonie , from Latin symphonia , from Greek , from symphonos 'sounding together' , from syn- ( ⇨ ↑ syn- ) + phone 'voice, sound' ]
1 . a long piece of music usually in four parts, written for an ↑ orchestra :
Bruckner’s Fifth Symphony
2 . ( also symphony orchestra ) a large group of ↑ classical musicians led by a ↑ conductor
—symphonic /sɪmˈfɒnɪk $ -ˈfɑː-/ adjective