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 ozone layer, a critical atmospheric shield, protects Earth from harmful ultraviolet radiation. Tom Howarth follow, Newsweek, 1 Nov. 2024 The movement to repair the hole in the ozone layer – which began in the early 1970s and continued for over 20 years – is considered one of the most successful environmental initiatives ever. K.j. Yossman, Variety, 25 Oct. 2024 The ozone layer, Earth’s protective shield against harmful UV radiation, was vanishing. Dr. Alex Gold, Forbes, 9 Oct. 2024 The two planetary boundary processes stratospheric ozone depletion (the loss of the ozone layer due to chemicals like CFCs) and atmospheric aerosol loading (primarily driven by the incomplete combustion of fossil fuels) are currently within the green zone at a global scale. Johan Rockström, TIME, 2 Oct. 2024 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

Dictionary Entries Near ozone layer

Cite this Entry

“Ozone layer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ozone%20layer. Accessed 23 Nov. 2024.

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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