Source : Webster's Revised Unabridged Dictionary (1913)

Enthusiastic \En*thu`si*as"tic\, Enthusiastical
\En*thu`si*as"tic*al\, a. [Gr. ? .]
   Filled with enthusiasm; characterized by enthusiasm; zealous;
   as, an enthusiastic lover of art. ``Enthusiastical
   raptures.'' --Calamy. -- {En*thu`si*as"tic*al*ly}, adv.

         A young man . . . of a visionary and enthusiastic
         character.                               --W. Irving.

Enthusiastic \En*thu`si*as"tic\, n.
   An enthusiast; a zealot. [Obs.]

Source : WordNet®

enthusiastic
     adj : having or showing great excitement and interest;
           "enthusiastic crowds filled the streets"; "an
           enthusiastic response"; "was enthusiastic about taking
           ballet lessons" [ant: {unenthusiastic}]