Legal Definition of Arbitrator: A disinterested person, chosen by the parties in a dispute, who will hear the details of the dispute and who will render a decision as to how the dispute shall be settled | Looking for a quicker, cost-effective, and confidential way to resolve disputes? Learn about the legal definition and important role of arbitrators in dispute resolution. Find out how arbitrators ensure a fair and impartial resolution and why their expertise is crucial in achieving satisfactory outcomes