
1) Atmospheric dynamic
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https://www.crosswordclues.com/clue/jet-stream

Jet streams are fast flowing, narrow air currents found in the atmospheres of some planets, including Earth. The main jet streams are located near the altitude of the tropopause, the transition between the troposphere and the stratosphere (where temperature increases with altitude). The major jet streams on Earth are westerly winds (flowing west t...
Found on
http://en.wikipedia.org/wiki/Jet_stream

Relatively strong winds concentrated within a narrow stream in the atmosphere. Generally refers to a quasi-horizontal jet stream of maximum winds embedded in the midlatitude westerlies, and concentrated in the high troposphere.
Found on
http://nsidc.org/arcticmet/glossary/jet_stream.html

a high-speed, wandering wind current in the upper troposphere that blows from west to east and affects weather
Found on
http://planetfacts.org/space-terms/

A narrow band of strong winds usually found at elevations from 20000 to 50000 feet.
Found on
http://www.avon-weather.com/glossary.html

A strong, high-level wind that can reach speeds in excess of 320 km/h (200 mph) - it is usually around 5-10 km up, in the atmosphere.
Found on
http://www.bbc.co.uk/weather/weatherwise/glossary/j.shtml

a region of long, narrow, high-speed winds that typically flow northeastward, eastward, and southeastward in the middle and upper troposphere or ... [7 related articles]
Found on
http://www.britannica.com/eb/a-z/j/13

A comparatively narrow current of air that moves around the northern and southern hemispheres of the Earth in wavelike patterns. It can be likened to a river of wind moving at high speed. The jet stream varies from about 100 to 400 miles (161 to 644 km) wide and 1 to 3 miles (1.6 to 4.8 km) thick. I...
Found on
http://www.daviddarling.info/encyclopedia/J/jet_stream.html

(Learning Modules / Geography / Weather forecasting) A ribbon of high speed wind flowing in the upper troposphere. Jet streams steer weather systems so understanding their movements helps medium range forecasts.
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http://www.encyclo.co.uk/visitor-contributions.php

A narrow band of winds blowing high in the troposphere at speeds in excess of 60 miles per hour but can reach speeds in excess of 300 miles per hour. Typically thousands of kilometres long, hundreds of kilometres wide and a few kilometres deep. They are closely associated with the weather systems in temperate latitudes.
Found on
http://www.metcheck.com/OTHER/glossary.asp

Relatively strong winds concentrated within a narrow band in the atmosphere.
Found on
http://www.stormfax.com/wxwords.htm

high speed air flow in the atmosphere forming air rivers several hundred miles across that generally move west to east and mark the boundary that separates two global air masses with significant differences in temperature.
Found on
http://www.tsgc.utexas.edu/stars/metgloss.html

[
n] - a high-speed high-altitude airstream blowing from west to east near the top of the troposphere
Found on
http://www.webdictionary.co.uk/definition.php?query=jet%20stream

relatively strong winds concentrated within a narrow stream in the atmosphere; generally refers to a quasi-horizontal jet stream of maximum winds embedded in the midlatitude westerlies , and concentrated in the high troposphere .
Found on
https://nsidc.org/cryosphere/glossary?page=14

strong, concentrated winds that generally move westward
Found on
https://sciencetrek.org/sciencetrek/topics/oceans/glossary.cfm

a wind on the earth that moves west to east and is the major source of weather movement
Found on
https://sciencetrek.org/sciencetrek/topics/volcanoes/glossary.cfm

A relatively narrow band of high-speed winds, generally greater than 50 knots (57 mph or 93 km/h), found in the upper troposphere above regions of strong horizontal temperature contrasts such as fronts. The major jet streams are the subtropical jet and the polar jet.
Found on
https://www.encyclo.co.uk/local/21131

Strong winds concentrated within a narrow zone in the atmosphere in the upper troposphere, about 30,000 feet aloft that generally move in an easterly direction that drive weather systems around the globe. In North America jet streams are more pronounced in winter.
Found on
https://www.encyclo.co.uk/local/21182

Narrow band of very fast wind (velocities of over 150 kph/95 mph) found at altitudes of 10–16 km/6–10 mi in the upper troposphere or lower stratosphere. Jet streams usually occur about the latitudes of the Westerlies (35°-60°). The jet stream may be used by high flying aircraft to speed their journeys. Their discover...
Found on
https://www.encyclo.co.uk/local/21221

Relatively strong winds that are concentrated in a narrow band in the atmosphere. Jet Streams are usually thousands of kilometers long, hundreds of kilometers wide but only a few kilometers thick. They are usually found between 6 and 10 miles above the surface.
Found on
https://www.encyclo.co.uk/local/22280
No exact match found.