Conductor

n.	1.	One who, or that which, conducts; a leader; a commander; a guide; a manager; a director. Zeal, the blind conductor of the will. - Dryden.
	2.	One in charge of a public conveyance, as of a railroad train or a street car.
	3.	(Mus.) The leader or director of an orchestra or chorus.
	4.	(Physics) A substance or body capable of being a medium for the transmission of certain forces, esp. heat or electricity; specifically, a lightning rod.
	5.	(Surg.) A grooved sound or staff used for directing instruments, as lithontriptic forceps, etc.; a director.
	6.	(Arch.) Same as Leader. Prime conductor (Elec.) the largest conductor of an electrical machine, serving to collect, accumulate, or retain the electricity.

Noun	1.	conductor - the person who leads a musical group Synonyms: music director, director
	2.	conductor - a device designed to transmit electricity, heat, etc.
	3.	conductor - a substance that readily conducts e.g. electricity and heat Antonyms: dielectric, insulator, nonconductor - a material such as glass or porcelain with negligible electrical or thermal conductivity
	4.	conductor - the person who collects fares on a public conveyance

Kapellmeister, Mahdi, administrator, agent, baggage man, bakehead, band leader, band major, bandmaster, bell cow, bell mare, bellwether, bodyguard, born leader, brakeman, brakie, butcher, cavalier, chaperon, charismatic leader, choirmaster, choragus, companion, conductance, conduction, conductivity, convoy, coryphaeus, deputy, dielectric, directeur, director, dispatcher, driver, drum major, duce, duenna, electric conduction, engineer, escort, esquire, fellow traveler, file leader, fireman, footplate man, forerunner, fugleman, functionary, gas conduction, governor, guard, handler, impresario, inspired leader, insulator, intendant, ionic conduction, leader, leader of men, lineman, liquid conduction, manager, manipulator, messiah, metallic conduction, mho, nonconductor, operant, operative, operator, orchestra leader, pacemaker, pacesetter, photoconduction, pilot, porter, precentor, producer, railroad man, railroader, rector, redcap, responsible person, ringleader, runner, safe-conduct, semiconductor, shepherd, smoke agent, squire, standard-bearer, stationmaster, steersman, stoker, supercargo, superconductivity, superconductor, swain, switchman, symphonic conductor, torchbearer, trainboy, trainman, trainmaster, usher, yardman, yardmaster