jet stream definition

  • noun:
    • A high-speed, meandering wind existing, generally speaking moving from a westerly course at rates usually exceeding 400 kilometers (250 kilometers) per hour at altitudes of 15 to 25 kilometers (ten to fifteen miles).
    • A high-speed stream; a jet.
    • any of the high-speed, high-altitude air currents that group the planet earth in a westerly way
    • a high-speed high-altitude airstream blowing from western to east near the the surface of the troposphere; has actually important aftereffects of the formation of weather fronts

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