The Collaborative International Dictionary of English v.0.48:

Spirited \Spir"it*ed\, a.
   1. Animated or possessed by a spirit. [Obs.] "So talked the
      spirited, sly snake." --Milton.
      [1913 Webster]

   2. Animated; full of life or vigor; lively; full of spirit or
      fire; as, a spirited oration; a spirited answer.
      [1913 Webster]

   Note: Spirited is much used in composition; as in
         high-spirited, low-spirited, mean-spirited, etc.
         [1913 Webster]

   Syn: Lively; vivacious; animated; ardent; active; bold;
        courageous.
        [1913 Webster] -- Spir"it*ed*ly, adv. --
        Spir"it*ed*ness, n.
        [1913 Webster]

WordNet (r) 3.0 (2006):

spiritedness
    n 1: quality of being active or spirited or alive and vigorous
         [syn: animation, spiritedness, invigoration, brio,
         vivification]