Source : Webster's Revised Unabridged Dictionary (1913)

Absoluteness \Ab"so*lute*ness\, n.
   The quality of being absolute; independence of everything
   extraneous; unlimitedness; absolute power; independent
   reality; positiveness.

Source : WordNet®

absoluteness
     n : the quality of being absolute; "the absoluteness of the
         Pope's decree could not be challenged"