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
The 35-pound Javelin ranges as far as 2.5 miles under infrared guidance.
—
David Axe, Forbes, 5 Nov. 2024
There’s also a front-facing speaker and a tiny working infrared remote control.
—Simon Hill, WIRED, 4 Nov. 2024
The researchers used advanced techniques, including gas chromatography and Fourier transform infrared spectroscopy, to determine what the tunic was made from.
—Marco Rubio, Newsweek, 1 Nov. 2024
Plastics, specifically, have special attributes in the shortwave infrared (SWIR) electromagnetic spectrum that aren’t present in sand or other organic debris.
—Mack Degeurin, Popular Science, 30 Oct. 2024
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David Axe, Forbes, 5 Nov. 2024
There’s also a front-facing speaker and a tiny working infrared remote control.
—Simon Hill, WIRED, 4 Nov. 2024
The researchers used advanced techniques, including gas chromatography and Fourier transform infrared spectroscopy, to determine what the tunic was made from.
—Marco Rubio, Newsweek, 1 Nov. 2024
Plastics, specifically, have special attributes in the shortwave infrared (SWIR) electromagnetic spectrum that aren’t present in sand or other organic debris.
—Mack Degeurin, Popular Science, 30 Oct. 2024
See all Example Sentences for infrared
Dictionary Entries Near infrared
Cite this Entry
“Infrared.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infrared. Accessed 22 Nov. 2024.
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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