re·frain 2 
(rĭ-frān)
(rĭ-frān)n.
1.
a. A phrase, verse, or group of verses repeated at intervals throughout a song or poem, especially at the end of each stanza.
b. Music for the refrain of a song.
2. A song or melody.
3. A repeated utterance or theme.
[Middle English refrein, from Old French refrain, alteration of refrait, past participle of refraindre, to break off, repeat, from Vulgar Latin *refrangere, to break off, alteration of Latin refringere; see REFRACT.]