Source : Webster's Revised Unabridged Dictionary (1913)

Comprehensiveness \Com`pre*hen"sive*ness\, n.
   The quality of being comprehensive; extensiveness of scope.

         Compare the beauty and comprehensiveness of legends on
         ancient coins.                           --Addison.

Source : WordNet®

comprehensiveness
     n 1: completeness over a broad scope [syn: {fullness}]
     2: an ability to understand a broad range of topics; "a teacher
        must have a breadth of knowledge of the subject" [syn: {breadth}]