jet stream jet set • jettage · · · Info · Definitions · Characters · · jet stream · · Text Common · · Latin · · Scripts 10 · · Length 2 · · Syllables Definitions · · · (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. Synonyms: jet stream. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 j latin small letter j U+006A m latin small letter m U+006D r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074