acid rain

noun

: rain that has increased acidity caused by environmental factors (such as atmospheric pollutants)

Examples of acid rain in a Sentence

trees damaged by acid rain
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.
Scientists and public health officials have long tracked the pollutants that cause smog, acid rain, and other environmental health hazards and shared them with the public through the local Air Quality Index. Katharine Gammon, Scientific American, 27 Mar. 2025 Coal emissions can also lead to health issues, including respiratory illness, lung disease, acid rain, smog, and neurological and developmental damage. Kelly Livingston, ABC News, 18 Mar. 2025 The Guardian reports that the scientist who discovered acid rain in North America said the United States could see acid rain return after Trump’s rollbacks of pollution regulations. Cara Buckley, New York Times, 27 Mar. 2025 Cities that were once notorious for their thick, choking smog – such as Los Angeles, Houston and Pittsburgh – now see far cleaner air, while lakes and forests devastated by acid rain in the Northeast have rebounded. Richard E. Peltier, The Conversation, 12 Mar. 2025 See All Example Sentences for acid rain

Word History

First Known Use

1845, in the meaning defined above

Time Traveler
The first known use of acid rain was in 1845

Browse Nearby Words

Cite this Entry

“Acid rain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acid%20rain. Accessed 16 Apr. 2025.

Kids Definition

acid rain

noun
: rain with increased acidity that is caused by environmental factors (as atmospheric pollutants)

Medical Definition

acid rain

noun
: acid precipitation especially in the form of rain

More from Merriam-Webster on acid rain

Last Updated: - Updated example sentences
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