Refrain

==Definition==
A line, or part of a line, or a group of lines, which is repeated in the course of a poem, sometimes with slight changes, and usually at the end of each stanza. A refrain may consist only of a single word—"Nevermore" as in Poe's "The Raven" (1845)—or of an entire stanza. Abrams, W.H. A Glossary of Literary Terms. 
==Examples==
*Owen's Dulce et Decorum Est.
Dulce et Decorum est (title, 27)