The Collaborative International Dictionary of English v.0.48:

Homeliness \Home"li*ness\, n. [From Homely.]
   1. Domesticity; care of home. [Obs.] "Wifely homeliness."
      --Chaucer.
      [1913 Webster]

   2. Familiarity; intimacy. [Obs.] --Chaucer.
      [1913 Webster]

   3. Plainness; want of elegance or beauty.
      [1913 Webster]

   4. Coarseness; simplicity; want of refinement; as, the
      homeliness of manners, or language. --Addison.
      [1913 Webster]

WordNet (r) 3.0 (2006):

homeliness
    n 1: having a drab or dowdy quality; lacking stylishness or
         elegance [syn: dowdiness, drabness, homeliness]
    2: an appearance that is not attractive or beautiful; "fine
       clothes could not conceal the girl's homeliness" [syn:
       homeliness, plainness]