Source : Webster's Revised Unabridged Dictionary (1913)

Sprightly \Spright"ly\, a. [Compar. {Sprightlier}; superl.
   {Sprightliest}.] [See {Sprite}.]
   Sprightlike, or spiritlike; lively; brisk; animated;
   vigorous; airy; gay; as, a sprightly youth; a sprightly air;
   a sprightly dance. ``Sprightly wit and love inspires.''
   --Dryden.

         The sprightly Sylvia trips along the green. --Pope.

Source : WordNet®

sprightly
     adj : full of spirit and vitality; "a sprightly young girl"; "a
           sprightly dance"
     [also: {sprightliest}, {sprightlier}]