Source : Webster's Revised Unabridged Dictionary (1913)

Exciting \Ex*cit"ing\, a.
   Calling or rousing into action; producing excitement; as,
   exciting events; an exciting story. -- {Ex*cit"ing*ly}, adv.

   {Exciting causes} (Med.), those which immediately produce
      disease, or those which excite the action of predisposing
      causes.

Source : WordNet®

exciting
     adj 1: creating or arousing excitement; "an exciting account of her
            trip" [ant: {unexciting}]
     2: stimulating interest and discussion; "an exciting novel"