What is the burden of a song; a phrase or verse which recurs at the end of each of the separate stanzas or divisions of a poetic composition. We hear the wild refrain. Whittier called?

refrain — The burden of a song; a phrase or verse which recurs at the end of each of the separate stanzas or divisions of a poetic composition. We hear the wild refrain. Whittier. (Webster's 1913.)

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