Definitions

1. noun

a type of electromagnetic radiation with a wavelength longer than that of visible light, but shorter than that of microwaves, used in thermography, remote sensing, and night vision.

“The camera uses an infrared sensor to capture images in low light conditions.”

2. adjective

relating to or involving radiation with a wavelength longer than visible light.

“The infrared lamp helps to warm up the room on a cold winter night.”

3. adverb

in or through the region of the electromagnetic spectrum with wavelengths longer than visible light.

“The object emits infrared light.”