n. - One who, or that which, conducts; a leader; a commander; a guide; a manager; a director.
n. - One in charge of a public conveyance, as of a railroad train or a street car.
n. - The leader or director of an orchestra or chorus.
n. - A substance or body capable of being a medium for the transmission of certain forces, esp. heat or electricity; specifically, a lightning rod.
n. - A grooved sound or staff used for directing instruments, as lithontriptic forceps, etc.; a director.
n. - Same as Leader.