Usually means: Excessive artificial light disrupting ecosystems.
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We found 14 dictionaries that define the word light pollution:

General (10 matching dictionaries)
  1. light pollution: Longman Dictionary of Contemporary English
  2. light pollution: Merriam-Webster
  3. light pollution: Oxford Learner's Dictionaries
  4. light pollution: American Heritage Dictionary of the English Language
  5. light pollution: Collins English Dictionary
  6. light pollution: Wiktionary
  7. light pollution: Infoplease Dictionary
  8. light pollution: Dictionary.com
  9. Light pollution: Wikipedia, the Free Encyclopedia
  10. light pollution: TheFreeDictionary.com

Science (2 matching dictionaries)
  1. Light Pollution: Eric Weisstein's World of Astronomy
  2. LIGHT POLLUTION: Zoom Astronomy Glossary

Tech (2 matching dictionaries)
  1. light pollution: NATURAL RESOURCES DEFENSE COUNCIL
  2. JPL Terms (No longer online)

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Definitions from Wiktionary (light pollution)

▸ noun:  An excess of artificial light, especially near urban areas, reducing visibility of stars, etc. in the night sky.

Similar:
light trespass, pseudostar, pollution, bad light, false light, bloom, mist, slighting, mislight, blighting, more...

Opposite:
dark sky, night sky, starry sky

Phrases:
Ecological light pollution, source of light pollution, more...

▸ Words similar to light pollution

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▸ Rhymes of light pollution

▸ Invented words related to light pollution

Similar:
light trespass, pseudostar, pollution, bad light, false light, bloom, mist, slighting, mislight, blighting, more...

Opposite:
dark sky, night sky, starry sky

Phrases:
Ecological light pollution, source of light pollution, more...



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