Author's explanatory note that concludes a book.

a brief stanza concluding certain forms of poetry

or ENVOY A short final stanza of a poem, especially a ballade or sestina, serving as a concise summary, as in Villon's " Des Dames du Temps Jadis." Sidelight: The Occitan troubadours' term for an envoi was tornada (return). They used tornadas in chant royales as well as ballades.