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.
The act of speaking in a quiet voice, especially, without vibration of the vocal cords.
A private message to an individual in a chat room.
A low rustling sound, like that of the wind in leaves.
A rumor.
A faint trace or hint (of something).
To speak softly, or under the breath, so as to be heard only by one near at hand; to utter words without sonant breath; to talk without that vibration in the larynx which gives sonorous, or vocal, sound.
To speak with suspicion or timorous caution; to converse in whispers, as in secret plotting.
To make a low, sibilant sound.
To mention privately and confidentially, or in a whisper.