Polyphonic :: Polyphonic (a.) Consisting of several tone series, or melodic parts, progressing simultaneously according to the laws of counterpoint; contrapuntal; as, a polyphonic composition; -- opposed to homophonic, or monodic..
Polyphony :: Polyphony (n.) Multiplicity of sounds, as in the reverberations of an echo..
Polyphony :: Polyphony (n.) Plurality of sounds and articulations expressed by the same vocal sign.
Polyphony :: Polyphony (n.) Composition in mutually related, equally important parts which share the melody among them; contrapuntal composition; -- opposed to homophony, in which the melody is given to one part only, the others filling out the harmony. See Counterpoint..