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.
There are other factors that can influence image quality, such as light pollution. Chris McMullen, Space.com, 21 Nov. 2025 The certification of Artis is not a key step in the worldwide effort to reduce light pollution and keep night skies dark, but also a benefit to the animals that live in and around the zoo—and us humans, too. Evie Carrick, Travel + Leisure, 20 Nov. 2025 The time of night, light pollution, cloud coverage, and other factors can all influence how well the lights can be seen. Connor Greene, Time, 13 Nov. 2025 After all, the northern lights tend to dance low on the northern horizon, so clear skies and minimal light pollution are key. Kimberlee Speakman, PEOPLE, 12 Nov. 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 23 Nov. 2025.

Last Updated: - Updated example sentences
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