n. One to whom something is referred; especially, a person to whom a matter in dispute has been referred for settlement or decision; an arbitrator; an umpire.n. Specifically, in law, a person selected by the court or parties under authority of law to try a cause in place of the court, or to examine and report on a question in aid of the court, or to perform some function involving judicial or quasi-judicial powers.To preside over as referee or umpire.