light pollution


Definition of light pollution

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

Examples of light pollution in a Sentence

Recent Examples on the Web

Report your observation and compare it to light pollution elsewhere in the world. Kiona Smith-strickland, Popular Mechanics, "Citizen Space: How to Study the Universe Without Leaving Home," 10 Jan. 2014 Check out this light pollution map to chart out a dark place to watch. Brian Resnick, Vox, "The Orionid meteor shower peaks this weekend. Here’s how to watch.," 20 Oct. 2018 As always, the most important thing for stargazing hopefuls is to get as far away from light pollution as possible. Eleanor Hildebrandt, Popular Mechanics, "How to Watch the December 2018 Geminid Meteor Shower," 10 Dec. 2018 The lack of inhabitants makes Etna prime for escaping light pollution on summer nights. Joe Jackson, San Francisco Chronicle, "One Day, One Place: Etna, California," 8 June 2018 After relations with Italy normalized in 1929, the astronomers fled Rome’s light pollution by moving 15 miles southeast to the papal summer home here in the Alban Hills. Kyle Peterson, WSJ, "An Astronomer’s View of the Christmas Sky," 21 Dec. 2018 At night, detailed close-ups of the moon and Milky Way let passersby see views of the sky typically rendered impossible by urban light pollution. Maria Carter, Country Living, "See How This Artist Camouflaged Freeway Billboards With Nature Scenes," 27 July 2015 The surrounding mountains provide a nice backdrop and being slightly removed from urban LA means there's far less light pollution. Anna Goldwater Alexander, WIRED, "Look Closely: These Aren't Flowers—They're Fireworks," 2 July 2018 Scientists revere the mountain for its summit above the clouds that provides a clear view of the sky with very little air and light pollution. Washington Post, "Giant telescope project before Hawaii Supreme Court again," 21 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'light pollution.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of light pollution

1968, in the meaning defined above

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Last Updated

18 Mar 2019

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The first known use of light pollution was in 1968

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light pollution


English Language Learners Definition of light pollution

: light from cities, vehicles, etc., that makes it difficult to see things in the sky (such as stars) at night

Comments on light pollution

What made you want to look up light pollution? Please tell us where you read or heard it (including the quote, if possible).


a shady place in a garden or forest

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