re·​flec·​tor | \ ri-ˈflek-tər How to pronounce reflector (audio) \

Definition of reflector

1 : one that reflects especially : a polished surface for reflecting light or other radiation
2 : a telescope in which the principal focusing element is a mirror

Examples of reflector in a Sentence

safety devices such as bicycle reflectors Reflectors are placed along the lanes of the highway.
Recent Examples on the Web For now, commissioners agreed to install tall reflector polls along the shoulders of the roadways to guide motorists during flooding and prevent them from dangerously wandering into a ditch. Martin E. Comas,, "East Seminole residents call for action on ‘extremely dangerous’ flooded roads near Lake Harney," 16 Oct. 2020 Their idea was to recreate Arecibo on the moon by suspending an antenna from the lip of a crater and using the basin as a reflector. Daniel Oberhaus Supercluster, Smithsonian Magazine, "Why Astronomers Want to Build a SETI Observatory on the Moon," 2 Oct. 2020 Testing the signal strength of the pristine reflector on the orbiter can help scientists determine what's happening with the reflectors on the surface. Ashley Strickland, CNN, "The reason we're shooting laser beams between Earth and the moon," 13 Aug. 2020 To test their theory and troubleshoot the problem, NASA scientists decided to fire lasers at a similar reflector on the LRO. Nora Mcgreevy, Smithsonian Magazine, "Scientists Shot Lasers at a Lunar Orbiter for a Decade. Then, One Bounced Back," 20 Aug. 2020 This reflector telescope’s 5.1-inch aperture can gather lots of light for great telescopic views, and its shorter frame offers easy portability. Dana Holmes, CNN Underscored, "A beginner’s guide to stargazing," 18 Aug. 2020 Earlier this week, the facility was forced to close down after a cable supporting a metal platform above the telescope fell, tearing a 100-foot gash in its giant reflector dish. CBS News, "Iconic observatory seen in James Bond film goes dark after massive telescope found mysteriously broken," 15 Aug. 2020 After a woman reported damage to a light post at 6:46 p.m. June 25, an officer found the top broken off and pieces from a vehicle reflector. cleveland, "Police catch masked bandits digging up dirt: Russell Township Police Blotter," 2 July 2020 First, items needed for an emergency should be easily accessible: a fire extinguisher, a reflector, a tire iron and a bottle of water. Heloise, Washington Post, "Hints From Heloise: Furloughed or laid off — what’s the difference?," 9 June 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'reflector.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of reflector

1665, in the meaning defined at sense 1

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Time Traveler for reflector

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The first known use of reflector was in 1665

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Statistics for reflector

Last Updated

25 Oct 2020

Cite this Entry

“Reflector.” Dictionary, Merriam-Webster, Accessed 27 Oct. 2020.

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More Definitions for reflector


How to pronounce reflector (audio)

English Language Learners Definition of reflector

: an object that is used to reflect light


re·​flec·​tor | \ ri-ˈflek-tər How to pronounce reflector (audio) \

Kids Definition of reflector

: a shiny surface for reflecting light or heat


re·​flec·​tor | \ ri-ˈflek-tər How to pronounce reflector (audio) \

Medical Definition of reflector

: one that reflects especially : a polished surface for reflecting light or other radiation

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