{ } n. [ It. quartetto, dim. of quarto the fourth, a fourth part, fr. L. quartus the fourth. See Quart. ] 1. (Mus.) (a) A composition in four parts, each performed by a single voice or instrument. (b) The set of four person who perform a piece of music in four parts. [ 1913 Webster ]

2. (Poet.) A stanza of four lines. [ 1913 Webster ]