A reflector can mean one of several things:Science Reflector, a device that causes reflection (for example, a mirror or a retroreflector) In photography, a reflector is used to control lighting contrast Reflecting telescope Reflector the part of an antenna that reflects radio waves Reflector, a component of some rotor machines (a type of cipher machine), such as the Enigma machine, that sends electrical impulses that have reached it from the machine's