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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The authors wrote that rocket soot increases stratospheric temperatures, alters atmospheric circulation and depletes the ozone layer. Jamie Carter, Forbes.com, 23 May 2026 While satellite launches mostly produce black carbon, which has a potential to warm the upper atmosphere, satellite re-entries generate aluminum oxides, which can damage the ozone layer. Tereza Pultarova, Space.com, 18 May 2026 The strength of these winds has been linked, in part, to the increase of planet-heating pollution from burning fossil fuels, as well as the hole in the ozone layer above the continent. Laura Paddison, CNN Money, 8 May 2026 During this same period, the thinning of the ozone layer of the Earth’s atmosphere became a subject of focus for scientists. Encyclopedia Britannica, 1 May 2026 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 3 Jun. 2026.

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

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