In music, monody refers to a solo vocal style distinguished by having a single melodic line and instrumental accompaniment.
(In the context of ancient Greek literature, monody, μονῳδία, could simply refer to lyric poetry sung by a single performer, rather than by a chorus.)
Musical monody, which developed out of an attempt by the Florentine Camerata in the 1580s to restore ancient Greek practices of melody and declamation (probably with little historical accuracy), one solo voice sings a melodic part, usually with considerable ornamentation, over a rhythmically independent bass line.
The development of monody was one of the defining characteristics of early Baroque practice, as opposed to late Renaissance style, in which groups of voices sang independently and with a greater balance between parts.
An important early treatise on monody is contained in Giulio Caccini's song collection, Le nuove musiche (Florence, 1601).