The Collaborative International Dictionary of English v.0.48:

Allegoric \Al`le*gor"ic\, Allegorical \Al`le*gor"ic*al\, a. [F.
   all['e]gorique, L. allegorius, fr. Gr. ?. See Allegory.]
   Belonging to, or consisting of, allegory; of the nature of an
   allegory; describing by resemblances; figurative. "An
   allegoric tale." --Falconer. "An allegorical application."
   --Pope.
   [1913 Webster]

         Allegorical being . . . that kind of language which
         says one thing, but means another.       --Max Miller.
   [1913 Webster] Al`le*gor"ic*al*ly, adv. --
   Al`le*gor"ic*al*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

allegorically
    adv 1: in an allegorical manner; "the play ended allegorically"