Webster's Revised Unabridged Dictionary · 1913

Paan

Paan (pē`an) , noun

[Latin paean, Greek paia`n, from Paia`n the physician of the gods, later, Apollo. Compare Paon, Peony.]

1.
An ancient Greek hymn in honor of Apollo as a healing deity, and, later, a song addressed to other deities.
2.
Any loud and joyous song; a song of triumph, joy, or praise. — De Quincey
Public paans of congratulation. — Dryden
3.
See Paon.

Also: Paean