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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By analyzing tree rings from across the Northern Hemisphere, scientists reconstructed the long-term history of an atmospheric phenomenon known as a locked wave-5 jet stream pattern — where the jet stream forms five wavy ridges and troughs around the planet. Hayleigh Evans, AZCentral.com, 13 Oct. 2025 All four of the giant planets (Jupiter, Saturn, Uranus, and Neptune) have super-fast jet streams at their equators. Christopher McFadden, Interesting Engineering, 11 Oct. 2025 However, its moisture-rich air has been scooped up by a weather system riding through a dip in the jet stream along the West Coast. Chris Dolce, CNN Money, 10 Oct. 2025 In the East, the northern branch of the jet stream tends to carry faster-moving, less intense storms, which can mean snowfall near or even below average, with temperatures closer to seasonal norms, AccuWeather said. Doyle Rice, USA Today, 9 Oct. 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 19 Oct. 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

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