A vocal performance with no instrumental accompaniment.
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.
Singing solely or mainly without instrumental accompaniment.
Related to a form of purely vocal music mostly associated with American college performance groups.
A humming or deep murmuring sound.
One of the fixed-pitch pipes on a bagpipe.
One who performs menial or tedious work.
A person without the ability to think critically and independently, especially one who follows a group blindly; a non-player character.
A remotely controlled aircraft, an unmanned aerial vehicle (UAV).
A Toyota HiAce or a similar van, especially one used by Ugandan state agents to kidnap opposition members.
A male ant, bee or wasp, which does not work but can fertilize the queen.
A genre of music that uses repeated lengthy droning sounds.
A low-pitched hum or buzz.
To speak in a monotone way.
To produce a low-pitched hum or buzz.
To kill with a missile fired by unmanned aircraft.