jet stream


Definition of jet stream

: 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 high acts as a force field of sorts, diverting the jet stream northward and deflecting any inclement weather into Canada. Matthew Cappucci, Anchorage Daily News, 20 July 2022 The high acts as a force field of sorts, diverting the jet stream northward and deflecting any inclement weather into Canada. Matthew Cappucci, Washington Post, 18 July 2022 But subtropical moisture carried along by a strong jet stream will bring the region a wet air mass starting Thursday night that will continue through the weekend. oregonlive, 8 June 2022 Heat domes shunt the jet stream to the north, meaning the river of swiftly-moving upper-atmospheric winds was racing over the Northern Plains with plenty of momentum for thunderstorms to tap into. Matthew Cappucci, Washington Post, 5 July 2022 Early this week a fast jet stream was blowing through much of New England including above Mount Washington in New Hampshire. Dave Epstein,, 21 June 2022 Blame a northward bulge in the jet stream that unfolded over the Southwestern states this week, AccuWeather said. John Bacon, USA TODAY, 12 June 2022 An approaching high-altitude disturbance embedded within the jet stream also energized the storms. Jason Samenow, Washington Post, 9 June 2022 The subtropical jet stream is formed when warm air from the equator meets the cool air from the polar regions and flows from west to east. Anusha Krishnan, Quartz, 30 May 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'jet stream.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of jet stream

1947, in the meaning defined above

Learn More About jet stream

Time Traveler for jet stream

Time Traveler

The first known use of jet stream was in 1947

See more words from the same year

Dictionary Entries Near jet stream


jet stream


See More Nearby Entries 

Statistics for jet stream

Last Updated

10 Aug 2022

Cite this Entry

“Jet stream.” Dictionary, Merriam-Webster, Accessed 17 Aug. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for jet stream

jet stream


Kids Definition of jet stream

: high-speed winds blowing from a westerly direction several miles above the earth's surface

More from Merriam-Webster on jet stream Encyclopedia article about jet stream


Test Your Vocabulary

Odd Habits and Quirks

  • image1926873504
  • Which of the following best describes an easily irritated person?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!