The Collaborative International Dictionary of English v.0.48:

Ugliness \Ug"li*ness\, n.
   The quality or state of being ugly.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ugliness
    n 1: qualities of appearance that do not give pleasure to the
         senses [ant: beauty]
    2: the quality of being wicked [syn: nefariousness,
       wickedness, vileness, ugliness]

The Devil's Dictionary (1881-1906):

UGLINESS, n.  A gift of the gods to certain women, entailing virtue
without humility.