A vocal performance with no instrumental accompaniment.
Singing solely or mainly without instrumental accompaniment.
Related to a form of purely vocal music mostly associated with American college performance groups.
In a manner of a choir with no instrumental accompaniment; literally, "in the style of the (Sistine) Chapel (in Rome)", such as a musical Mass done a cappella.
A polyphonic song for about six voices, from 16th century Italy.
A song for a small number of unaccompanied voices; from 13th century Italy.
A short poem, often pastoral, and suitable to be set to music.