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
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First Known Use of jet stream
1947
JET STREAM Defined for English Language Learners
jet stream
Definition of jet stream for English Language Learners
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: a strong current of fast winds high above the Earth's surface
JET STREAM Defined for Kids
jet stream
Definition of jet stream for Students
: high-speed winds blowing from a westerly direction several miles above the earth's surface
Learn More about jet stream
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See words that rhyme with jet stream Britannica.com: Encyclopedia article about jet stream
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