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 shrill, high-pitched sound made by whistling.
A device designed to be placed in the mouth and blown, or driven by steam or some other mechanism, to make a whistling sound.
An act of whistling.
Any high-pitched sound similar to the sound made by whistling.
A suit (from whistle and flute).
The mouth and throat; so called as being the organs of whistling.
To make a shrill, high-pitched sound by forcing air through the mouth. To produce a whistling sound, restrictions to the flow of air are created using the teeth, tongue and lips.
To make a similar sound by forcing air through a musical instrument or a pipe etc.
To move in such a way as to create a whistling sound.
To send, signal, or call by a whistle.