From Longman Dictionary of Contemporary Englishjet streamˈjet stream noun [singular] HEMa current of very strong winds high above the Earth’s surface
Examples from the Corpus
jet stream• El Nino also diverts the paths of the jet stream and storms.• Recently the jet stream has retreated northward, meteorologists say, leaving the field undefended against those intrusive southern storms.• You almost feel guilty paying attention to the jet stream of consciousness.• The aircraft would have crossed this jet stream at a shallow angle which would have resulted in considerably reduced ground speed.• The forecast issued at Keflavik did not mention this jet stream. 