👉 Judicata is a legal doctrine in which an arbitrator's decision is final and irrevocable. It refers to the principle that if a party challenges an arbitrator's decision, it must be overturned by a subsequent court of law or an appeal process. This means that an arbitrator's decision cannot be reversed on appeal, as long as it has been made in accordance with the rules of the arbitration. In essence, the doctrine protects the integrity and fairness of the arbitral process.