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.
Trade acquisition Kyle Tucker brings optimism, but the team still hasn't made that one move that would catapult them into a stratosphere currently occupied by the teams from New York and Southern California. Justin Kaufmann, Axios, 10 Jan. 2025 As for that whole Rodri thing… maybe Sands could lower that down to someone in his own stratosphere? Greg O'Keeffe, The Athletic, 10 Jan. 2025 For those in the earnings stratosphere, the cap means that Social Security taxes can literally begin and end on Jan. 1. Gerald Scorse, New York Daily News, 8 Jan. 2025 And to think, just last week Beyoncé was the most exciting thing in the football stratosphere — not anymore. Kimberly Wilson, Essence, 30 Dec. 2024 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

Dictionary Entries Near stratosphere

Cite this Entry

“Stratosphere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/stratosphere. Accessed 18 Jan. 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

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