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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
The jet stream is more orderly in the winter months, when cold air prevents its winds from wandering off track.
—Tribune News Service, The Mercury News, 19 Sep. 2024
When that happens, the jet stream also tends to stall, which can leave weather systems stuck in place.
—Meghan Bartels, Scientific American, 17 Sep. 2024
Instead of drawing on the ocean’s heat, the jet stream — a fast-moving, high-altitude air current — can continue driving the remnants of a hurricane over land, similar to the mechanism behind major winter storms.
—Umair Irfan, Vox, 14 Aug. 2024
Year-to-year differences in tornadoes are due to how the storm tracks line up and how the jet stream — strong winds in the upper levels of the atmosphere — is situated, Vavrus said.
—Claire Reid, Journal Sentinel, 29 July 2024
See all Example Sentences for jet stream
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'jet stream.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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 29 Sep. 2024.
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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