Source : Webster's Revised Unabridged Dictionary (1913)

Rightness \Right"ness\, n. [AS. rihtnes.]
   Straightness; as, the rightness of a line. --Bacon.

   2. The quality or state of being right; right relation.

            The craving for rightness with God.   --J. C.
                                                  Shairp.

Source : WordNet®

rightness
     n 1: according with conscience or morality [ant: {wrongness}]
     2: appropriate conduct; doing the right thing [syn: {appropriateness}]
        [ant: {inappropriateness}]
     3: conformity to fact or truth [syn: {correctness}] [ant: {incorrectness},
         {incorrectness}]
     4: conformity with some esthetic standard of correctness or
        propriety; "it was performed with justness and beauty"
        [syn: {justness}, {nicety}]