Source : Webster's Revised Unabridged Dictionary (1913)

Tidiness \Ti"di*ness\, n.
   The quality or state of being tidy.

Source : WordNet®

tidiness
     n 1: the habit of being tidy [ant: {untidiness}]
     2: the trait of being neat and orderly [syn: {neatness}] [ant:
        {untidiness}]