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 that are titled 'tribunals' are so described to emphasize that they are not courts of normal jurisdiction. For example, the International Criminal Tribunal for Rwanda is a body specially constituted under international law; in Great Britain, employment tribunals are bodies set up to hear specific employment disputes. Private judicial bodies are also often styled 'tribunals'. The word tribunal is not conclusive of a body's function. For example, in Great Britain, the Employment Appeal Tribunal is a superior court of record.
The term is derived from the tribunes, magistrates of the Classical Roman Republic. "Tribunal" originally referred to the office of the tribunes, and the term is still sometimes used in this sense in historical writings.
In the Republic of Ireland, tribunal popularly refers to a public inquiry established under the Tribunals of Inquiry (Evidence) Act 1921. The main difference between a Parliamentary Inquiry (non statutory) and a Tribunal of Inquiry in Ireland is that non-statutory inquiries are not vested with the powers, privileges, and rights of the High Court. Tribunals of Inquiry are. Tribunals are established by resolution of the Houses of the Oireachtas to enquire into matters of urgent public importance. It is not a function of Tribunals to administer justice, their work is solely inquisitorial. Tribunals are obliged to report their findings to the Oireachtas. They have the power to enforce the attendance and examination of witnesses and the production of documents relevant to the work in hand. Tribunals can consist of one or more people. A layperson, or non-lawyer, may be the Sole member of a tribunal.