Dictionary

jet stream

noun

: a strong current of fast winds high above the Earth's surface

Full 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 Kids

jet stream

noun

Definition of JET STREAM for Kids

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

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