stratosphere

noun

strato·​sphere ˈstra-tə-ˌsfir How to pronounce stratosphere (audio)
1
: the part of the earth's atmosphere which extends from the top of the troposphere to about 30 miles (50 kilometers) above the surface and in which temperature increases gradually to about 32°F (0°C) and clouds rarely form
2
: a very high or the highest region on or as if on a graded scale
construction costs in the stratosphere
the celebrity stratosphere
stratospheric adjective
stratospherically adverb

Did you know?

The stratosphere (strato- simply means "layer" or "level") lies above the earth's weather and mostly changes very little. It contains the ozone layer, which shields us from the sun's ultraviolet radiation except where it's been harmed by manmade chemicals. The levels of the atmosphere are marked particularly by their temperatures; stratospheric temperatures rise only to around 32°—very moderate considering that temperatures in the troposphere below may descend to about -70° and those in the ionosphere above may rise to 1000°.

Examples of stratosphere in a Sentence

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.
During their 15 years together, Bieber launched into the pop stratosphere, becoming one of the most popular artists on the planet, today boasting more than 78 million monthly listeners on Spotify, where 17 of his songs — or songs he’s been featured on — have each amassed over a billion streams. Shirley Halperin, HollywoodReporter, 16 Apr. 2025 Standing comfortably in the fairway with a chance to elevate into a new stratosphere, just one shot back of the leader Scottie Scheffler, Åberg and caddie Joe Skovron agreed on a 5-iron starting out well right of the water and drawing over to the green. Brody Miller, New York Times, 7 Apr. 2025 If there are people within your stratosphere that are difficult or are toxic for you, stay away, man, stay away, don't waste your energy on these people. Barbara A. Perry, Newsweek, 28 Jan. 2025 Getting another running back on Day 3 is a wise move, and getting Deion Sanders into the Cowboys’ stratosphere at No. 239 will certainly make Jerry Jones smile. Saad Yousuf, New York Times, 8 Apr. 2025 See All Example Sentences for stratosphere

Word History

Etymology

borrowed from French stratosphère, probably from stratus stratus (from the zone's layer-like character, compared to stratus clouds) + -o- -o- + -sphère -sphere

Note: The term was introduced, along with troposphère, by the French meteorologist Léon Tesserenc de Bort (1855-1913). See note at troposphere.

First Known Use

1908, in the meaning defined at sense 1

Time Traveler
The first known use of stratosphere was in 1908

Browse Nearby Words

Cite this Entry

“Stratosphere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/stratosphere. Accessed 24 Apr. 2025.

Kids Definition

stratosphere

noun
strato·​sphere ˈstrat-ə-ˌsfi(ə)r How to pronounce stratosphere (audio)
: an upper portion of the atmosphere above the troposphere where temperature changes little and clouds rarely form

More from Merriam-Webster on stratosphere

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!