infrared
adjective
in·fra·redˌin-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
infrarednoun
Examples ofinfrared in a Sentence
Recent Examples on the WebAt its core, this is an LED device, packed with red, amber, andinfrared lights.—
Jacqueline Kilikita,Refinery29, 12 Feb. 2026Gas and dust swirling around a black hole block visible light, butinfrared light can punch right through.—Paul Sutter,Space.com, 11 Feb. 2026Instead of the Stinger’s low-resolution rosette scan, the NGSRI uses a high-resolutioninfrared imaging seeker that offers a better chance of locking onto low-signature targets.—David Szondyfebruary 08,New Atlas, 8 Feb. 2026Most of the galaxies in the Universe are small and faint; most of the stars in the Universe emit primarily red or eveninfrared light; most of the galaxies in the Universe are rich in dust; most of the Universe that’s observable to us are located at significant cosmic distances.—Big Think, 4 Feb. 2026See All Example Sentences forinfrared
Examples are automatically compiled from online sources to show current usage.Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.Send us feedback.
Jacqueline Kilikita,Refinery29, 12 Feb. 2026Gas and dust swirling around a black hole block visible light, butinfrared light can punch right through.—Paul Sutter,Space.com, 11 Feb. 2026Instead of the Stinger’s low-resolution rosette scan, the NGSRI uses a high-resolutioninfrared imaging seeker that offers a better chance of locking onto low-signature targets.—David Szondyfebruary 08,New Atlas, 8 Feb. 2026Most of the galaxies in the Universe are small and faint; most of the stars in the Universe emit primarily red or eveninfrared light; most of the galaxies in the Universe are rich in dust; most of the Universe that’s observable to us are located at significant cosmic distances.—Big Think, 4 Feb. 2026See All Example Sentences forinfraredWord History
First Known Use
1881, in the meaning defined atsense 1
Phrases Containinginfrared
Rhymes forinfrared
Browse Nearby Words
Cite this Entry
“Infrared.”Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infrared. Accessed 17 Feb. 2026.
Copy CitationKids Definition
infrared
adjectivein·fra·redˌin-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
infrarednoun
Medical Definition
infrared
1 of 2adjectivein·fra·redˌin-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 2noun:infrared radiation
More from Merriam-Webster oninfrared
Love words? Need even more definitions?
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Merriam-Webster unabridgedMore from Merriam-Webster
[8]ページ先頭
©2009-2026 Movatter.jp