re·flec·tor | \ri-ˈflek-tər \

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

The bicycles were equipped with reflectors but no lights. Nick Powell, Houston Chronicle, "One dead after vehicle strikes two bicyclists in Galveston," 5 June 2018 Currently, the state employs places a single row of red reflectors every half mile on its freeways. Tony Bizjak, sacbee, "Wrong-way freeway drivers will now be confronted with a ‘sea of red,’ Caltrans says," 15 Jan. 2018 The other instrument is a large-aperture laser angle reflector for ranging measurements between Earth and the spacecraft. Eric Berger, Ars Technica, "China takes a critical first step toward landing on the far side of the Moon," 21 May 2018 Diamond powder light reflectors work to improve the look of dark circles (the bane of every traveler), and hydrating marine extracts hold moisture for instant results. Necee Regis,, "Here, there, and everywhere," 29 May 2018 Business insider indicated that during Israel's missions over Syria and near Beirut the F-35s were flying with radar reflectors, but not in stealth mode. Gordon Dickson, star-telegram, "Lockheed Martin's F-35 has finally flown in combat. How did it do? | Fort Worth Star-Telegram," 25 May 2018 The change rippled out to companies such as Alliance Spacesystems of Los Alamitos, which makes composite and lightweight structures for satellite components such as solar arrays and antenna reflectors. Samantha Masunaga,, "Southern California suppliers learn to adjust to slowdown in satellite orders," 23 May 2018 Quieter air conditioning, a surround-sound system, ceiling reflectors and custom acoustic panels will also be installed. Devin Alessio, ELLE Decor, "The Sydney Opera House Is Getting A Major Makeover," 22 Aug. 2016 There is an array of GPS monitors and a system of reflectors along the ridge, and lasers are flashed across the valley at the slide area every half-hour. Kirk Johnson, Anchorage Daily News, "In Washington state, a natural disaster unfolds in slow motion," 22 Jan. 2018

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.

See More

First Known Use of reflector

1665, in the meaning defined at sense 1

Keep scrolling for more

Learn More about reflector

Statistics for reflector

Look-up Popularity

Time Traveler for reflector

The first known use of reflector was in 1665

See more words from the same year

Keep scrolling for more

More Definitions for reflector



English Language Learners Definition of reflector

: an object that is used to reflect light


re·flec·tor | \ri-ˈflek-tər \

Kids Definition of reflector

: a shiny surface for reflecting light or heat


re·flec·tor | \ri-ˈflek-tər \

Medical Definition of reflector 

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

Keep scrolling for more

Comments on reflector

What made you want to look up reflector? Please tell us where you read or heard it (including the quote, if possible).


to reject or criticize sharply

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!