DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Flighty \Flight"y\, a.
      1. Fleeting; swift; transient.
         [1913 Webster]
               The flighty purpose never is o'ertook,
               Unless the deed go with it.           --Shak.
         [1913 Webster]
      2. Indulging in flights, or wild and unrestrained sallies, of
         imagination, humor, caprice, etc.; given to disordered
         fancies and extravagant conduct; volatile; giddy;
         eccentric; slighty delirious.
         [1913 Webster]
               Proofs of my flighty and paradoxical turn of mind.
                                                     --Coleridge.
         [1913 Webster]
               A harsh disciplinarian and a flighty enthusiast.
                                                     --J. S.
                                                     Harford.
         [1913 Webster]