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

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 The home had a welcoming, lived-in feeling, says Gilder, and there was minimal light pollution. Samantha Weiss Hills, Curbed, "A Fire Island house brings the spirit of sand and surf indoors," 9 July 2018 And because fireflies light up less when light pollution is present, visitors with flashlights and cellphones can interrupt mating and impact the next firefly generation. Washington Post, "TravelLab: In a forest on the trail of synchronous fireflies," 20 June 2018 But with light pollution threatening our view of the stars in many urban and suburban areas, the best way to get a good glimpse is to travel somewhere really, really dark. Megan Michelson, Outside Online, "These Are the Best Stargazing Spots in North America," 13 July 2018 Night skies are unimpeded by light pollution, guaranteeing spectacular views of the Milky Way. David Swanson,, "National parks where you can find solitude in summer," 1 July 2018 Text appears on a black background to minimize light pollution. azcentral, "GalaPro app’s accessibility, translation services come to ASU Gammage, Tony Awards," 9 June 2018 But what for those astronomers out there, the park is also low on light pollution, giving skywatchers perfect nights to view the stars. Jason Duaine Hahn,, "Thinking About Visiting a National Park? Here's Everything You Need to Know for the Best Trip Ever," 3 July 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.

See More

First Known Use of light pollution

1968, in the meaning defined above

Keep scrolling for more

Learn More about light pollution

Share light pollution

Statistics for light pollution

Last Updated

14 Oct 2018

Look-up Popularity

Time Traveler for light pollution

The first known use of light pollution was in 1968

See more words from the same year

Keep scrolling for more

More Definitions for light pollution

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).


amusing and light sparring with words

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
Spell It

Can you spell these 10 commonly misspelled words?

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!