A Justice

1. The state or characteristic of being just or fair.
2. The ideal of fairness, impartiality, etc., especially with regard to the punishment of wrongdoing.
3. Judgment and punishment of a party who has allegedly wronged another.
4. The civil power dealing with law.
5. A title given to judges of certain courts; capitalized when placed before a name.
6. Correctness, conforming to reality or rules.

(judge of various lower courts):

(judge of a superior court): justiciar, justiciary

injustice