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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
Another surprise came via the detection of titanium on Tylos, just beneath the jet stream.
—
Matt Robison, Newsweek, 18 Feb. 2025
Meteorologists attribute this active pattern to the positioning of the jet stream, which is funneling storms across the northern US.
—
Artemis Moshtaghian, CNN, 8 Feb. 2025
This particular storm is hitching a ride on the jet stream that supercharges it.
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Megan Forrester, ABC News, 24 Jan. 2025
This cooling strengthens the polar jet stream and shifts it northward, leading to distinct winter weather patterns across the United States.
—
Jim Foerster, Forbes, 23 Jan. 2025
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Word History
First Known Use
1947, in the meaning defined above
Dictionary Entries Near jet stream
Cite this Entry
“Jet stream.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/jet%20stream. Accessed 26 Feb. 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
Britannica.com: Encyclopedia article about jet stream
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