Source : Webster's Revised Unabridged Dictionary (1913)

Ballade \Bal*lade"\, n. [See {Ballad}, n.]
   A form of French versification, sometimes imitated in
   English, in which three or four rhymes recur through three
   stanzas of eight or ten lines each, the stanzas concluding
   with a refrain, and the whole poem with an envoy.

Source : WordNet®

ballade
     n : a poem consisting of 3 stanzas and an envoy