Definition of: sestina

(ses·tē′nə) noun
A verse form consisting of six stanzas of six, generally unrimed, lines each and a three–line envoy: the end words of the first stanza are progressively changed in order in the remaining five, and appear medially and terminally in the envoy. Also ses′tine (-tin). [<Ital. <sesto sixth <L sextus]