A reflector can mean one of several things:

• A device that causes reflection, for example, a mirror or a retroreflector
• A reflecting telescope
• A device or a part of an antenna that reflects radio waves
• A neutron reflector
• A reflector (cipher machine) is 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 rotors, back in reverse order through those rotors.
• In LAPACK the term reflector with the types block reflector and elementary reflector is used to describe the functionality of the routines that implement the Householder transformation
• A reflective device placed on roads and highways to aid vehicle traffic at night, Cat's eye (road)
• the .NET Reflector code browser utility
• A computer program such as GNU Mailman, LISTSERV or Majordomo that re-mails electronic mail to a pre-determined distribution list
• The newsletter of the Boston section of the IEEE. ^*
• Reflector (Pablo Cruise album), a 1981 album by Pablo Cruise
• Reflector (Killing Heidi album), a 2000 album by Killing Heidi
• Reflector (PlanetShakers album), a 2002 album by PlanetShakers
• A Decepticon in the Transformers toyline of the 1980s.

Reflektor | Reflektor