1. Device that reflects radiation
   "They installed reflectors along the highway to improve visibility at night"
    
2. Optical telescope consisting of a large concave mirror that produces an image that is magnified by the eyepiece
   "Isaac Newton invented the reflector in 1668";
   - reflecting telescope
    
3. A small, often red, reflecting disk on the rear of a vehicle that reflects the headlights of other vehicles
   "The bicycle had reflectors on its pedals for safety"

Derived forms: reflectors

Type of: device, optical telescope

Encyclopedia: Reflector, The