One who conducts or leads; a guide; a director.
A person who conducts an orchestra, choir or other music ensemble; a professional whose occupation is conducting.
An ideal of a ring that measures how far it is from being integrally closed
A grooved sound or staff used for directing instruments, such as lithontriptic forceps; a director.
A person who takes tickets on public transportation and also helps passengers.
Something that can transmit electricity, heat, light, or sound.
A leader.
The administrator of an opera house or theater.
A governor in various specific contexts, including certain South American countries, and historically in the kingdoms of Spain, Portugal, and France, and in imperial China.