reflectorPronunciation: /rɪˈflɛktə/Translate reflector | into French | into German | into Italian | into Spanish Definition of reflector noun 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. an object or device which reflects radio waves, seismic vibrations, sound, or other waves. a reflecting telescope. Spelling helpThe ending of reflector is spelled -or.reflector in other Oxford dictionaries Definition of reflector in the US English dictionary