Search Result for "jet stream":
Wordnet 3.0

NOUN (1)

1. 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; 



WordNet (r) 3.0 (2006):

jet stream
    n 1: 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