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
Subsequent investigation using data from NASA's Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) revealed that the star brightened in the infrared one year before the optical flash, hinting at the presence of dust.
—
David Faris, MSNBC Newsweek, 11 Apr. 2025
Custom closets have space for all your clothes, and the spa-like bathroom sports marble vanities and indoor and outdoor showers (the inside one is steam equipped), plus a full infrared sauna big enough to invite some friends.
—Tori Latham, Robb Report, 9 Apr. 2025
The scientists placed the tiles on a 100 °C (212 °F) hot plate for 15 minutes and tracked temperature changes with an infrared camera.
—New Atlas, 4 Apr. 2025
Each camera captures sharp 1080p video, with color in the daytime and infrared LEDs for night vision.
—John Mihaly, PC Magazine, 31 Mar. 2025
See All Example Sentences for infrared
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David Faris, MSNBC Newsweek, 11 Apr. 2025
Custom closets have space for all your clothes, and the spa-like bathroom sports marble vanities and indoor and outdoor showers (the inside one is steam equipped), plus a full infrared sauna big enough to invite some friends.
—Tori Latham, Robb Report, 9 Apr. 2025
The scientists placed the tiles on a 100 °C (212 °F) hot plate for 15 minutes and tracked temperature changes with an infrared camera.
—New Atlas, 4 Apr. 2025
Each camera captures sharp 1080p video, with color in the daytime and infrared LEDs for night vision.
—John Mihaly, PC Magazine, 31 Mar. 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 22 Apr. 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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