Source : Webster's Revised Unabridged Dictionary (1913)

Completeness \Com*plete"ness\, n.
   The state of being complete.

Source : WordNet®

completeness
     n 1: the state of being complete and entire; having everything
          that is needed [ant: {incompleteness}]
     2: (logic) an attribute of a logical system that is so
        constituted that a contradiction arises if any proposition
        is introduced that cannot be derived from the axioms of
        the system

Source : Free On-Line Dictionary of Computing

completeness
     
        {complete}