English Reference

Word

stratosphere

Phoneticsstrato·sphere

US/ˈstɹætəsˌfɪɹ/

UK/stɹˈætəsfˌiə/

Definition

n. the second layer of the Earth's atmosphere, located above the troposphere. It is much thinner than the layer below and contains a layer of ozone that protects us from the sun's harmful rays.

n. the second major layer of the Earth's atmosphere, situated above the troposphere and below the mesosphere. Characterised by a temperature increase with altitude and containing the ozone layer.

Examples

“The ozone layer is found in the stratosphere.”

“Commercial airplanes typically fly in the lower part of the stratosphere to avoid turbulence and weather systems.”

“The stratosphere is a relatively stable layer of the atmosphere, which is why it is often used as a reference point for measuring atmospheric pressure and temperature changes.”

Examples

simple

“The ozone layer is found in the stratosphere.”

contextual

“Commercial airplanes typically fly in the lower part of the stratosphere to avoid turbulence and weather systems.”

complex

“The stratosphere is a relatively stable layer of the atmosphere, which is why it is often used as a reference point for measuring atmospheric pressure and temperature changes.”

Real-World Examples

Common in science writing

“For instance, an increase in greenhouse gases in the atmosphere causes the troposphere to warm while the stratosphere cools.”
Phys.org · 17 Aug 2026
“Volcanic eruptions inject sulfur dioxide into the stratosphere, where it becomes a haze of tiny droplets that reflect sunlight back into space.”
Ars Technica · 9 Aug 2026

Etymology

From French stratosphère, a word coined by its discoverer, meteorologist Léon Teisserenc de Bort. From strato- + -sphere.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Domain

Geology

This entry

Level
C1 · Advanced
Frequency
Occasional
Updated

Scan code

englishreference.com/q/stratosphere

English Reference