A paean ( /ˈpiːən/) is a song or lyric poem expressing triumph or thanksgiving. In classical antiquity, it is usually performed by a chorus, but some examples seem intended for an individual voice (monody). It comes from the Greek παιάν (also παιήων or παιών), "song of triumph, any solemn song or chant." "Paeon" was also the name of a divine physician and an epithet of Apollo.
Read more about Paean: Ancient Greek Paean, In Greek Poetry and Music, Modern Usage