Meaning

• 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.

• A person who takes tickets on public transportation and also helps passengers

  "train conductor; tram conductor"

• Something that can transmit electricity, heat, light or sound.

• 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 leader.