infrared

adjective
in·​fra·​red | \ ˌin-frə-ˈred How to pronounce infrared (audio) , -(ˌ)frä-, -fə-\

Definition of infrared

1 : situated outside the visible spectrum at its red end used of radiation having a wavelength between about 700 nanometers and 1 millimeter
2 : relating to, producing, or employing infrared radiation infrared therapy
3 : sensitive to infrared radiation infrared sensors that detect body heat

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Other Words from infrared

infrared noun

Examples of infrared in a Sentence

Recent Examples on the Web An auctioneer spotted the artwork — which measures just eight inches by ten inches — and suggested the woman have a series of tests performed using infrared light to determine its worth. Hannah Chubb, PEOPLE.com, "A Lost Masterpiece Worth $26 Million Was Discovered in an Unsuspecting Elderly Woman's Kitchen," 29 Oct. 2019 One envisions a few mid-infrared telescopes orbiting in formation about 150 meters apart and combining their light to get sharp views of Earth-like exoplanets. Daniel Clery, Science | AAAS, "Fleets of flying telescopes and returning samples from Venus among Europe's space hopes," 24 Oct. 2019 The scanner played a beam of infrared light across the glacier, its front, and the sea ice, tracking the calving process iceberg by iceberg. Paul Voosen, Science Magazine, "A project to monitor every aspect of a fast-shrinking glacier could hold an answer to an urgent question: How fast will seas rise?," 10 Oct. 2019 Vasyanovych, who wrote, directed, filmed and edited, opens on a chilling infrared image shot from directly overhead. Deborah Young, The Hollywood Reporter, "'Atlantis': Film Review | Venice 2019," 7 Sep. 2019 The near-infrared images loop and swirl like impressionist paintings, showing distinct bright streaks in the clouds that trace the movement of aerosols emitted by wildfires, human emissions, and volcanoes. Cathleen O'grady, Ars Technica, "Aerosol emissions may not cool the planet as much as we thought," 1 Aug. 2019 The blaze, which burned for hours, turned the early morning sky a bright orange and could be seen on infrared weather images captured from satellites. And, USA TODAY, "Shutdown of fire-gutted massive Philadelphia refinery pushes gas prices higher, costs 1,000 jobs," 27 June 2019 There was no body text, but attached was a 10-second video clip, shot in the eerie grays of infrared night vision. Ryan Bradley, New York Times, "Letter of Recommendation: Bushnell Trophy Cam," 18 Jan. 2018 The infrared cameras can be used to track employees—or at least, the heat given off from their bodies. The Economist, "Companies are taking advantage of their new ability to track their workers," 12 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'infrared.' 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 infrared

1881, in the meaning defined at sense 1

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Statistics for infrared

Last Updated

18 Nov 2019

Time Traveler for infrared

The first known use of infrared was in 1881

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More Definitions for infrared

infrared

adjective
How to pronounce infrared (audio)

English Language Learners Definition of infrared

technical : producing or using rays of light that cannot be seen and that are longer than rays that produce red light

infrared

adjective
in·​fra·​red | \ ˌin-frə-ˈred How to pronounce infrared (audio) \

Kids Definition of infrared

: being, relating to, or producing rays like light but lying outside the visible spectrum at its red end

infrared

adjective
in·​fra·​red | \ ˌin-frə-ˈred How to pronounce infrared (audio) \

Medical Definition of infrared

 (Entry 1 of 2)

1 : lying outside the visible spectrum at its red end used of radiation having a wavelength between about 700 nanometers and 1 millimeter
2 : relating to, producing, or employing infrared radiation infrared therapy

infrared

noun

Medical Definition of infrared (Entry 2 of 2)

: infrared radiation

More from Merriam-Webster on infrared

Rhyming Dictionary: Words that rhyme with infrared

Spanish Central: Translation of infrared

Nglish: Translation of infrared for Spanish Speakers

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