DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   fleeting
       adj 1: lasting for a markedly brief time; "a fleeting glance";
              "fugitive hours"; "rapid momentaneous association of
              things that meet and pass"; "a momentary glimpse" [syn:
              fleeting, fugitive, momentaneous, momentary]