'Justness' definitions:

Definition of 'justness'

noun

Conformity with some esthetic standard of correctness or propriety; "it was performed with justness and beauty" [syn: justness, rightness, nicety]

noun

The quality of being just or fair [syn: justice, justness] [ant: injustice, unjustness]

From: GCIDE

Justness \Just"ness\, n. The quality of being just; conformity to truth, propriety, accuracy, exactness, and the like; justice; reasonableness; fairness; equity; as, justness of proportions; the justness of a description or representation; the justness of a cause. [1913 Webster]
In value the satisfaction I had in seeing it represented with all the justness and gracefulness of action. --Dryden. [1913 Webster]
Note: Justness is properly applied to things, and justice to persons; but the distinction is not always observed.
Syn: Accuracy; exactness; correctness; propriety; fitness; reasonableness; equity; uprightness; justice. [1913 Webster]