vocal music

Vocal music is music performed by one or more singers, with or without non-vocal instrumental accompaniment, in which singing provides the main focus of the piece. Music which employs singing but does not feature it prominently is generally considered instrumental music (e.g. the wordless women's choir in the final movement of Holst's The Planets) as is music without singing. Music without any non-vocal instrumental accompaniment is referred to as a cappella.
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A choir, chorale, or chorus is a musical ensemble of singers. A body of singers who perform together is called a choir or chorus. The former term is very often applied to groups affiliated with a church (whether or not they actually occupy the quire) and the second to groups that perform in theatres or concert halls, but this distinction is far from rigid. "Choir" has the secondary definition of a subset of an ensemble; thus one speaks of the "woodwind choir" of an orchestra, or different "choirs" of voices and/or instruments in a polychoral composition. In typical 18th to 20 century oratorios  and masses, chorus or choir is usually understood to imply more than one singer per part, in contrast to the quartet of soloists also featured in these works.
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Noun
1. music that is vocalized (as contrasted with instrumental music)
(hypernym) music
(hyponym) singing, vocalizing