\Round"e*lay\, n. [OF. rondelet, dim. of rondel. See {Roundel}, {Roundeau}, and cf. {Roundlet}, {Rundlet}.] 1. (Poetry) See {Rondeau}, and {Rondel}. 2. (Mus.) (a) A tune in which a simple strain is often repeated; a simple rural strain which is short and lively. --Spenser. Tennyson. (b) A dance in a circle. 3. Anything having a round form; a roundel.