Definition of infrared
- infrared therapy
- infrared sensors that detect body heat
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'infrared.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: producing or using rays of light that cannot be seen and that are longer than rays that produce red light
What made you want to look up infrared? Please tell us where you read or heard it (including the quote, if possible).
to pay off by making regular payments
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