Something, such as a surface, that reflects.(noun)
A reflecting telescope.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "reflector" in a sentence
"Douglas - not 'reflector' - greenhouse gases absorb photons, their energy (vibration, rotation, speed) increases; they transfer energy by collisions, and they emit photons."
"I hope this season to commence a series of observations with the twenty-foot reflector, which is now in fine order."
"Gifted with the sort of mind which we must call a reflector, he appropriated the sallies of others, the wit of the stage and the petits journaux, by his method of repeating them, and applied them as formulas of criticism."