A person who is appointed to resolve a dispute in an Arbitration. The arbitrator may be appointed as an expert in the area of dispute. An arbitrator effectively takes on a similar role of judge in court proceedings, and must make an arbitration 'award' which is binding on the parties. In more complex arbitration, a number of arbitrators may be appointed, usually not more than three. Arbitrators may have duties and obligations under the uniform arbitration legislation of each state.