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.
Spectators will have the best luck at dark sky locations on cloud-free nights and away from city light pollution. Eric Lagatta, USA Today, 2 July 2026 Aurora watchers should look north, avoid light pollution, and use long-exposure camera settings. Jamie Carter, Forbes.com, 1 July 2026 As light pollution has spread with urban development over the past two centuries, astronomers have increasingly been retreating into ever more remote locations. Tereza Pultarova, Space.com, 1 July 2026 Scientists say West Virginia’s low light pollution is creating a refuge for fireflies, including rare species that flash in perfect unison. Evie Carrick, Travel + Leisure, 1 July 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 5 Jul. 2026.

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