infrared
adjective
in·fra·red
ˌin-frə-ˈred 
-(ˌ)frä-,
-fə-
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
infrared
noun
Examples of infrared in a Sentence
Recent Examples on the Web
Four infrared LEDs provide up to 30 feet of black-and-white night video.
—
PC Magazine, 28 Apr. 2025
Using active binocular infrared imaging technology, and a RGB camera, the robot vacuum can create 3D models in real time to identify obstacles—even in the dark.
—Terri Williams, Architectural Digest, 23 Apr. 2025
It is powered by gas, which heats up an infrared top-heating panel that gives any food inside an even cook, and also heats the top surface for a secondary hotplate.
—New Atlas, 23 Apr. 2025
Powered by a blend of nourishing antioxidants, this lightweight formula offers superior protection from UVA, UVB, and infrared rays while boosting your skin’s defense against pollution and blue light.
—Conçetta Ciarlo, Vogue, 23 Apr. 2025
See All Example Sentences for infrared
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PC Magazine, 28 Apr. 2025
Using active binocular infrared imaging technology, and a RGB camera, the robot vacuum can create 3D models in real time to identify obstacles—even in the dark.
—Terri Williams, Architectural Digest, 23 Apr. 2025
It is powered by gas, which heats up an infrared top-heating panel that gives any food inside an even cook, and also heats the top surface for a secondary hotplate.
—New Atlas, 23 Apr. 2025
Powered by a blend of nourishing antioxidants, this lightweight formula offers superior protection from UVA, UVB, and infrared rays while boosting your skin’s defense against pollution and blue light.
—Conçetta Ciarlo, Vogue, 23 Apr. 2025
See All Example Sentences for infrared
Cite this Entry
“Infrared.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infrared. Accessed 3 May. 2025.
Copy CitationKids Definition
infrared
adjective
in·fra·red
ˌin-frə-ˈred
-(ˌ)frä-
: being, relating to, producing, or using rays like light but lying outside the visible spectrum at its red end
infrared radiation
infrared
noun
Medical Definition
infrared
1 of 2 adjective
in·fra·red
ˌin-frə-ˈred
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
2 of 2 noun
: infrared radiation
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