Source : Webster's Revised Unabridged Dictionary (1913)

Untidy \Un*ti"dy\, a.
   1. Unseasonable; untimely. [Obs.] ``Untidy tales.'' --Piers
      Plowman.

   2. Not tidy or neat; slovenly. -- {Un*ti"di*ly}, adv. --
      {Un*ti"di*ness}, n.

Source : WordNet®

untidiness
     n 1: the condition of being untidy [ant: {tidiness}]
     2: the trait of being untidy and messy [syn: {messiness}] [ant:
         {tidiness}]