Source : Webster's Revised Unabridged Dictionary (1913)

Rightfulness \Right"ful*ness\, n.
   1. The quality or state of being rightful; accordance with
      right and justice.

   2. Moral rectitude; righteousness. [Obs.] --Wyclif.

            We fail of perfect rightfulness.      --Sir P.
                                                  Sidney.

Source : WordNet®

rightfulness
     n : anything in accord with principles of justice; "he feels he
         is in the right"; "the rightfulness of his claim" [syn: {right}]
         [ant: {wrong}, {wrong}]