reflector

/rɪˈflɛktər/
noun
  1. A surface or device that reflects light, sound, heat, or other energy, often used to increase visibility or direct energy.
    • The road worker wore a vest with bright reflectors for safety.
    • Astronomers use a large reflector in the telescope to gather light from distant stars.
    • The bicycle has a red reflector on the back so cars can see it at night.
  2. A person or thing that reflects or embodies something, such as an idea or quality.
    • The museum's collection acts as a reflector of the region's cultural history.
    • His calm voice was a reflector of the peace he felt inside.
    • Her art is a reflector of the social changes happening in the city.
Synonyms