Res judicata

- a judicially decided matter. The rule that if a dispute is judged by a court of competent jurisdiction, the judgment of the court is final and conclusive as to the rights and duties of the parties involved. Res judicata constitutes an absolute bar to a subsequent suit for the same cause of action. See also Autrefois acquit; Autrefois convict; Double jeopardy; Estoppel; Issue estoppel; Res judicata pro veritate accipitur .

(Ref: Butterworths Concise Australian Legal Dictionary)