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Word of the Day Wednesday, June 10, 2026

stratosphere

/strætəˈsfɪər/ noun · British & US
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What does stratosphere mean?

noun

The layer of the atmosphere extending from about 12 to 50 kilometers above the Earth's surface, characterized by a decrease in temperature with altitude. It is the second layer of the atmosphere, above the troposphere and below the mesosphere.

Example

"The plane flew through the stratosphere, reaching an altitude of over 30,000 feet."

Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.

Etymologically related

Synonyms for stratosphere

Antonyms of stratosphere

Rhymes with stratosphere