light therapy

noun

: the treatment of medical or psychiatric conditions (such as seasonal affective disorder) by the controlled application of light

called also light treatment, phototherapy

Examples of light therapy in a Sentence

Recent Examples on the Web
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The full spa gives a nod to sauna, ice bath, hot bath, massage, and infrared light therapy, attends to wellness. Kathleen Turner, Forbes.com, 23 June 2026 What’s Actually Proven and What Isn’t Yet The near-infrared light therapy category has a legitimate clinical foundation. Allison Palmer, Miami Herald, 22 June 2026 Some of the tools used in cognitive behavioral therapy include light therapy lamps, wake-up lights and sound machines. Bestreviews, Chicago Tribune, 16 June 2026 Other options at the spa range from LED light therapy to custom cryotherapy experiences, but the Dior Light Suite is by far the standout, and the only one at a Parisian Palace hotel. Lane Nieset, Travel + Leisure, 12 June 2026 See All Example Sentences for light therapy

Word History

First Known Use

1987, in the meaning defined above

Time Traveler
The first known use of light therapy was in 1987

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Cite this Entry

“Light therapy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/light%20therapy. Accessed 27 Jun. 2026.

Medical Definition

light therapy

noun
: phototherapy
especially : the use of strong light (as of 10,000 lux intensity) for the treatment of depression and gloom (as in seasonal affective disorder)

called also light treatment

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