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 infrared eyes of NASA’s James Webb Space Telescope (JWST), the most advanced off-world observatory yet built, have also unveiled something cryptic—and far more profound than a bearded man.
—
Fabio Pacucci, Scientific American, 27 June 2024
On infrared satellite, roiling thunderstorms can be seen billowing and blossoming.
—Matthew Cappucci, Washington Post, 27 June 2024
In the next two weeks some 850 searches for her were conducted, with helicopters, infrared cameras and bloodhounds.
—Samira Asma-Sadeque, Peoplemag, 7 June 2024
The sprawling 5,000-square-foot facility includes treatment rooms, a sauna, flotation therapy, and an infrared sauna.
—Ryan Smith, Travel + Leisure, 20 June 2024
See all Example Sentences for infrared 
Fabio Pacucci, Scientific American, 27 June 2024
On infrared satellite, roiling thunderstorms can be seen billowing and blossoming.
—Matthew Cappucci, Washington Post, 27 June 2024
In the next two weeks some 850 searches for her were conducted, with helicopters, infrared cameras and bloodhounds.
—Samira Asma-Sadeque, Peoplemag, 7 June 2024
The sprawling 5,000-square-foot facility includes treatment rooms, a sauna, flotation therapy, and an infrared sauna.
—Ryan Smith, Travel + Leisure, 20 June 2024
See all Example Sentences for infrared
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'infrared.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near infrared
Cite this Entry
“Infrared.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infrared. Accessed 15 Jul. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share