The Collaborative International Dictionary of English v.0.48:

Ganesa \Ga*ne"sa\, Ganesh \Ganesh\, Ganesha \Ganesha\, prop. n.
   (Hindu Myth.)
   The Hindu god of wisdom, prudence and prophesy; the remover
   of obstacles.

   Syn: Ganapati.
        [1913 Webster WordNet 1.5]

   Note: He is represented as a short, fat, red-colored man,
         with a large belly and the head of an elephant.
         --Balfour.
         [1913 Webster]

WordNet (r) 3.0 (2006):

Ganesh
    n 1: Hindu god of wisdom or prophecy; the god who removes
         obstacles [syn: Ganesh, Ganesa, Ganesha, Ganapati]