Definitions for jet stream
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Random House Webster's College Dictionary
jet′ stream`(n.)
strong, generally westerly winds concentrated in a relatively narrow and shallow stream in the upper troposphere of the earth.
Category: Meteorology
the exhaust of a jet or rocket engine.
Category: Aeronautics, Rocketry
Origin of jet stream:
1945–50
Princeton's WordNet
jet stream(noun)
a high-speed high-altitude airstream blowing from west to east near the top of the troposphere; has important effects of the formation of weather fronts
Wiktionary
jet stream(Noun)
any of the high-speed, high-altitude air currents that circle the Earth in a westerly direction
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