Definition of "roundelay"

It fell upon a holly eve,Hey ho, hollidaye!When holly fathers wont to shrieve,Now gynneth this roundelay.

1579, Immeritô [pseudonym; Edmund Spenser], The Shepheardes Calender: […], London: […] Hugh Singleton, […]; reprinted as H[einrich] Oskar Sommer, editor, The Shepheardes Calender […], London: John C. Nimmo, […], 1890,

When merry milkmaids click the latchAnd rarely smells the new-mown hay,And the cock hath sung beneath the thatchTwice or thrice his roundelay,Twice or thrice his roundelay;Alone and warming his five wits,The white owl in the belfry sits.

1830, Alfred Lord Tennyson, Poems, Chiefly Lyrical, Song - The Owl

"Ay, fool," said Tristram, "but 'tis eating dryTo dance without a catch, a roundelayTo dance to." Then he twangled on his harp,And while he twangled little Dagonet stoodQuiet as any water-sodden logStay'd in the wandering warble of a brook; […]

1859, Alfred Tennyson, “(please specify the page)”, in Idylls of the King, London: Edward Moxon & Co., […]

For then the little birds do sing their sweetest song, all joining in one joyous medley, whereof one may scarce tell one note from another, so multitudinous is that pretty roundelay; […]

1903, Howard Pyle, “Chapter First”, in The Story of King Arthur and His Knights, Part II, page 61