A tribunal, generally, is any person or institution with authority to judge, adjudicate on, or determine claims or disputes—whether or not it is called a tribunal in its title. For example, an advocate who appears before a court with a single judge could describe that judge as "their tribunal." Many governmental bodies are titled "tribunals" to emphasize that they are not courts of normal jurisdiction. For example, the International Criminal Tribunal for Rwanda was a body specially constituted under international law; in Great Britain, employment tribunals are bodies set up to hear specific employment disputes. In many cases, the word tribunal implies a judicial body with a lesser degree of formality than a court, in which the normal rules of evidence and procedure may not apply, and whose presiding officers are frequently neither judges nor magistrates. Private judicial bodies are also often styled "tribunals." The word tribunal, however, is not conclusive of a body's function—for example, in Great Britain, the Employment Appeal Tribunal is a superior court of record.

A judge is a person who presides over court proceedings, either alone or as a part of a panel of judges. In an adversarial system the judge hears all the witnesses and any other evidence presented by the barristers or solicitors of the case, assesses the credibility and arguments of the parties, and then issues a ruling in the case based on their interpretation of the law and their own personal judgment. A judge is expected to conduct the trial impartially and, typically, in an open court.