light pollution

noun
Updated on: 18 Nov 2017

Definition of light pollution

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

Recent Examples of light pollution from the Web

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.

First Known Use of light pollution

1968


LIGHT POLLUTION Defined for English Language Learners

light pollution

noun

Definition of light pollution for English Language Learners

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


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