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 intriguing spa menu goes far beyond standard massages, with fascial release therapy, scalp exfoliation, abdominal massage, infrared heated body masks, and a magnesium-laden meridien massage to combat jet lag.
—
Amber Gibson, Travel + Leisure, 30 Apr. 2025
Heat therapy via infrared saunas has been a part of their wellness routines.
—Izzy Baskette, People.com, 6 May 2025
At the same time, the infrared wavelengths improve microcirculation and reduce inflammation in surrounding facial tissue, leading to a noticeable glow and improved skin tone over time.
—Julie Loffredi, Forbes.com, 5 May 2025
In 2006, the Japanese Aerospace Exploration Agency launched the infrared satellite AKARI, which was active until 2011.
—Julia Jacobo, ABC News, 2 May 2025
See All Example Sentences for infrared
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Amber Gibson, Travel + Leisure, 30 Apr. 2025
Heat therapy via infrared saunas has been a part of their wellness routines.
—Izzy Baskette, People.com, 6 May 2025
At the same time, the infrared wavelengths improve microcirculation and reduce inflammation in surrounding facial tissue, leading to a noticeable glow and improved skin tone over time.
—Julie Loffredi, Forbes.com, 5 May 2025
In 2006, the Japanese Aerospace Exploration Agency launched the infrared satellite AKARI, which was active until 2011.
—Julia Jacobo, ABC News, 2 May 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 20 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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