DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   airstream
       n 1: a relatively well-defined prevailing wind
       2: the flow of air that is driven backwards by an aircraft
          propeller [syn: slipstream, airstream, race,
          backwash, wash]