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
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The Meteorological Puzzle Climate experts point to unusual jet stream patterns as a key factor behind this atypical snowfall. Jim Foerster, Forbes, 4 Mar. 2025 Meteorologists say the timing is uncertain, but changes in the jet stream could bring cold air into North America and Eurasia. Hannah Parry, Newsweek, 4 Mar. 2025 There are signs that another stretching of the polar vortex or shift in the polar jet stream will take place at the end of February and into the first half of March, AccuWeather said. Doyle Rice, USA TODAY, 23 Feb. 2025 The polar vortex is area of fast-moving winds well above the Earth’s surface and the jet stream that circle the Arctic during the Northern Hemisphere’s coldest months. Mary Gilbert, CNN, 21 Feb. 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 9 Mar. 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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