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.
With no mountains to block it, light pollution carries for hundreds of miles. Sean MacAday, Sacbee.com, 19 Sep. 2026 Examples of extra light might include the glow of a face-up smartphone, radiance from a digital alarm clock or light pollution from outside. Sandee Lamotte, CNN Money, 9 Sep. 2026 The Crescent Nebula is too faint to be spotted with the naked eye, but can be seen with a moderate-to-large telescope equipped with a light pollution filter throughout September. Anthony Wood, Space.com, 8 Sep. 2026 Meanwhile, SpaceX has long worked to prevent its satellites from causing light pollution. Michael Kan, PC Magazine, 8 Sep. 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

Browse Nearby Words

Cite this Entry

“Light pollution.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/light%20pollution. Accessed 23 Sep. 2026.

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