noun po·lyph·o·ny \pə-ˈli-fə-nē\

Definition of polyphony

  1. :  a style of musical composition employing two or more simultaneous but relatively independent melodic lines :  counterpoint

Origin and Etymology of polyphony

Greek polyphōnia variety of tones, from polyphōnos having many tones or voices, from poly- + phōnē voice — more at ban

First Known Use: 1790

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