The Collaborative International Dictionary of English v.0.48:

Goddess \God"dess\, n.
   1. A female god; a divinity, or deity, of the female sex.
      [1913 Webster]

            When the daughter of Jupiter presented herself among
            a crowd of goddesses, she was distinguished by her
            graceful stature and superior beauty. --Addison.
      [1913 Webster]

   2. A woman of superior charms or excellence.
      [1913 Webster]

WordNet (r) 3.0 (2006):

goddess
    n 1: a female deity