Adjudication is the legal process by which an arbiter or judge reviews evidence and argumentation, including legal reasoning set forth by opposing parties or litigants, to come to a decision which determines rights and obligations between the parties involved.
Adjudication can also refer to the processes at dance competitions, in television game shows and at other competitive forums, by which competitors are evaluated and ranked and a winner is found.
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 instance, 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 but not all cases, tribunal implies a judicial or quasi-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. Tribunal is not conclusive of a body's function; in Great Britain, the Employment Appeal Tribunal is a superior court of record.