Referee

n. arbitrator, unbiased person who makes decisions and settles disputes; umpire, official who enforces game rules during sports competitions

v. act as referee, make decisions or settle disputes between two parties; enforce the rules at a sports match

A referee is a person who has authority to make decisions about play in many sports. Officials in some sports are known by a variety of other titles, including umpire, judge or linesman.
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Noun
1. (sports) the chief official (as in boxing or American football) who is expected to ensure fair play
(synonym) ref
(hypernym) official
(derivation) umpire
(classification) sport, athletics
2. someone who reads manuscripts and judges their suitability for publication
(synonym) reviewer, reader
(hypernym) critic
(hyponym) scanner
(derivation) peer review
3. an attorney appointed by a court to investigate and report on a case
(hypernym) lawyer, attorney
(classification) law, jurisprudence
Verb
1. be a referee or umpire in a sports competition
(synonym) umpire
(hypernym) judge
(derivation) ref
(classification) sport, athletics
2. evaluate professionally a colleague's work
(synonym) peer review
(hypernym) review, critique
(derivation) reviewer, reader

v. refer, send, direct

(n.)
One to whom a thing is referred; a person to whom a matter in dispute has been referred, in order that he may settle it.