Referee (-, 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.
Syn. -- Judge; arbitrator; umpire. See Judge.
Shades of meaning
Fernald has no entry of its own for referee; he lists it under judge.
Where he writes about it:
A referee is appointed by a court to decide disputed matters between litigants; an arbitrator is chosen by the contending parties to decide matters in dispute without action by a court. — from judge
Antonyms
none given