Simple Definition of infrared

from our Learner's Dictionary

infrared

adjective

ˌɪnfrəˈrɛd How to pronounce infrared (audio)
technical : producing or using rays of light that cannot be seen and that are longer than rays that produce red light
infrared radiation/beams
infrared photography

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“Infrared.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/infrared. Accessed 22 Apr. 2026.

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