light therapy


Definition of light therapy

: 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 There are also a spate of home and kitchen tech deals—including Roombas, Instant Pots, blenders, and light therapy lamps—dropping daily. Lori Keong, SELF, "17 Actually Worthwhile Early Black Friday Deals on Kitchen and Home Items," 24 Nov. 2020 There are also people who find great relief in light therapy from SAD lamps. Sadhbh O'sullivan,, "SAD Is Going To Hit Different This Year. Here’s How To Cope," 17 Nov. 2020 These bestselling light therapy lamps can help ease the symptoms of SAD and brighten up your winter days. Jessica Bennett, Better Homes & Gardens, "5 Top-Rated Light Therapy Lamps to Ease Seasonal Affective Disorder This Winter," 17 Nov. 2020 Despite the apparent connection between sunrise clocks with light-centric functions aiming to instill better sleeping habits, light therapy doesn’t include them in its orbit. Gideon Grudo, NBC News, "Best sunrise light alarm clocks and sunrise clocks 2020," 31 Oct. 2020 To help combat the onset of SAD, depression, mood swings or just a general feeling of lackluster, some medical experts recommend light therapy, which comes in many shapes and sizes. Gideon Grudo, NBC News, "Best sunrise light alarm clocks and sunrise clocks 2020," 31 Oct. 2020 Because if the real sun won't rise and shine to wake us, our light therapy alarm clocks will. Elizabeth Buxton,, "Light-Therapy Alarms For Gentler Morning Wake Ups," 29 Oct. 2020 Like most products, not all light therapy lamps are made equal. Banu Ibrahim, CNN Underscored, "These light therapy lamps can help beat the blues," 30 Sep. 2020 Another treatment option promoted by psychologists is light therapy, which uses a machine that mimics sunlight in an indoor setting like an office or a bedroom. Jay Cannon, USA TODAY, "Seasonal depression may hit a new low in 2020, experts say. Here's how to handle it.," 21 Oct. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'light therapy.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of light therapy

1935, in the meaning defined above

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The first known use of light therapy was in 1935

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Last Updated

30 Nov 2020

Cite this Entry

“Light therapy.” Dictionary, Merriam-Webster, Accessed 3 Dec. 2020.

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More Definitions for light therapy

light therapy


Medical Definition of light therapy

: 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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