ozone layer

noun

: an atmospheric layer at heights of about 20 to 30 miles (32 to 48 kilometers) that is normally characterized by high ozone content which blocks most solar ultraviolet radiation from entry into the lower atmosphere

Examples of ozone layer in a Sentence

Recent Examples on the Web
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As with the depletion of the ozone layer, everyone stands to lose from the development of superintelligence. Andrea Miotti, Time, 29 Oct. 2025 Synthetic chemicals called chlorofluorocarbons (CFCs), commonly used in refrigerants and aerosol cans, were tearing holes in the ozone layer, letting harmful ultraviolet radiation pour through. New Atlas, 25 Oct. 2025 An improved ozone layer also has blunted some effects of global warming – including the loss of phytoplankton, which have been reduced because of steps launched by the agreement. Andre Mouchard, Oc Register, 10 Oct. 2025 Teeming with tennis courts, specimen trees and stone mansions raised from the dirt by 19th-century railroad barons, the suburb makes wealth feel like weather, an ozone layer shrouding everything — ambient, constant and vital. New York Times, 7 Oct. 2025 See All Example Sentences for ozone layer

Word History

First Known Use

1927, in the meaning defined above

Time Traveler
The first known use of ozone layer was in 1927

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Cite this Entry

“Ozone layer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ozone%20layer. Accessed 12 Nov. 2025.

Kids Definition

ozone layer

noun
: a layer of the earth's atmosphere at heights of about 20 to 30 miles (32 to 48 kilometers) that is normally characterized by high ozone content which blocks most of the sun's ultraviolet radiation from entry into the lower atmosphere

More from Merriam-Webster on ozone layer

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