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.
What has stood out in April and May is persistence: The jet stream has remained wavy, bringing with it the normal ebb and flow of stormy low-pressure weather systems mixed with sunny high-pressure systems. Daniel Chavas, The Conversation, 23 May 2025 They’re usually fueled by a strong jet stream that sets up between a clash of colder air sweeping south over the East and warmer air pushing north over the Atlantic Ocean. Mary Gilbert, CNN Money, 21 May 2025 The meanderings of the jet stream—a narrow band of strong winds high in the atmosphere—are part of what determines how active a season becomes. Andrea Thompson, Scientific American, 20 May 2025 The powerful 115 mph upper-level jet stream winds will heighten storm conditions from eastern Texas to western Mississippi. Joe Edwards, MSNBC Newsweek, 4 Apr. 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 1 Jun. 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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