a piece of glass or metal for reflecting light in a required direction, e.g. a red one on the back of a motor vehicle or bicycle 反光镜;(汽车或自行车尾部红色的)反光罩 ■an object or device which reflects radio waves, seismic vibrations, sound, or other waves (无线电波、地震振荡、声音或其他波的)反射体,反射器 ■a reflecting telescope 反射式望远镜