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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And, over the last few weeks, several meters of fresh snow have fallen across Europe, part of a weather pattern driven by an unusual southerly jet stream that has dumped huge amounts of precipitation across the continent, causing flooding in lower altitude areas. Issy Ronald, CNN Money, 22 Feb. 2026 The jet stream is not lining up to deliver moisture to the southeast, Pastelok said. Bill Kearney, Sun Sentinel, 19 Feb. 2026 The freeze developed as the jet stream dipped sharply south during a strongly negative phase of what's called the Arctic Oscillation. Newsroom Meteorologist, Houston Chronicle, 13 Feb. 2026 As the temperature difference between the Arctic and the areas further south shrinks, the jet stream, which acts as a buffer between them, gets weaker, according to Jennifer Francis of the Woodwell Climate Research Center. N'dea Yancey-Bragg, USA Today, 8 Feb. 2026 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 22 Feb. 2026.

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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