Right'ful·ness noun 1. The quality or state of being rightful; accordance with right and justice. 2. Moral rectitude; righteousness. [ Obsolete] Wyclif. « We fail of perfect rightfulness .» Sir P. Sidney. Found on http://www.encyclo.co.uk/webster/R/82
noun anything in accord with principles of justice; `he feels he is in the right`; `the rightfulness of his claim` Found on https://www.encyclo.co.uk/local/20974