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.
For stargazers and scientists alike, this absence of light pollution creates an invaluable resource: a pristine, naturally dark sky. Valerie Stimac, Forbes.com, 16 May 2025 The airport replaced over 250 light fixtures to reduce light pollution, benefiting both stargazing and wildlife. Nathan Diller, USA Today, 14 May 2025 Areas in the United States that boast lower instances of light pollution—such as national parks like Big Bend in Texas or Death Valley in California—will have prime viewing opportunities. Rebecca Schneid, Time, 3 May 2025 April 21 - 28 is International Dark Sky Week, a global celebration of the night sky during which like-minded organizations and people take action to raise awareness of an inevitable aspect of modern-day life: the rising scourge of light pollution. Anthony Wood, Space.com, 26 Apr. 2025 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 2 Jun. 2025.

Last Updated: - Updated example sentences
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