IPA: //ˌpɒlɪˈfɒnɪk//
KK: /pɑːlɪˈfɒnɪk/
Relating to or having multiple sounds or voices at the same time, especially in music where different melodies are played together.
The choir performed a beautiful polyphonic piece that showcased various vocal harmonies.
Polyphonic → It is formed from "poly-" (from Greek "polus", meaning many) and "phonic" (from Greek "phonē", meaning voice or sound). The word describes music or sound that consists of many voices or parts.
Think of 'many' ('poly-') voices or sounds ('phonic') coming together — that's what polyphonic means.