light pollution

noun

: artificial skylight (as from city lights) that interferes especially with astronomical observations

Examples of light pollution in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Our dwindling night skies and expanding light pollution is slowly impacting plants, animals and humans in significant ways. Ernie Cowan, San Diego Union-Tribune, 26 Apr. 2026 Mitigating light pollution is most important during peak migration. K. R. Callaway, Scientific American, 24 Apr. 2026 At night, there is very little light pollution, with minimal lighting used beyond the glow of the tents, and the property tried its best to operate on a leave no trace mindset, with little construction having taken place beyond the original structure that has sat here for over a century. Condé Nast, Condé Nast Traveler, 23 Apr. 2026 If a healthy Christmas cactus refuses to bloom year after year, the problem may be that light pollution is disrupting its bloom cycle. Leanne Potts, Better Homes & Gardens, 23 Apr. 2026 See All Example Sentences for light pollution

Word History

First Known Use

1969, in the meaning defined above

Time Traveler
The first known use of light pollution was in 1969

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Cite this Entry

“Light pollution.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/light%20pollution. Accessed 29 Apr. 2026.

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