jet stream

noun

: a long narrow meandering current of high-speed winds near the tropopause blowing from a generally westerly direction and often exceeding a speed of 250 miles (402 kilometers) per hour

Examples of jet stream 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.
Warmer air, driven by rising carbon dioxide emissions, may be disrupting the jet stream and increasing instability at cruising altitudes. Sujita Sinha, Interesting Engineering, 2 Sep. 2025 AccuWeather anticipates the jet stream will lift northward once again by next weekend, causing an area of high pressure to stretch across Eastern states. Anna Skinner, MSNBC Newsweek, 1 Sep. 2025 La Niña’s biggest influence is always on the jet stream – a river of air that storms flow through. Mary Gilbert, CNN Money, 27 Aug. 2025 Its atmosphere is a chaotic ballet of clouds, lightning, and powerful jet streams. Kenna Hughes-Castleberry, Space.com, 23 Aug. 2025 See All Example Sentences for jet stream

Word History

First Known Use

1947, in the meaning defined above

Time Traveler
The first known use of jet stream was in 1947

Browse Nearby Words

Cite this Entry

“Jet stream.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/jet%20stream. Accessed 4 Sep. 2025.

Kids Definition

jet stream

noun
: a long narrow wandering current of high-speed winds blowing from a generally westerly direction several miles above the earth's surface

More from Merriam-Webster on jet stream

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