Arbiter

Arbiter is a person who settles a dispute, has ultimate authority in a matter, or whose views or actions have great influence over social behaviour and its trends.

One of the great arbiter of taste at Nero's court was Gaius Petronius, popularly known as Petronius Arbiter.

Nearby pages
Arbiter Elegantiarum, Arbitrage, Arbitrageur, Arbitrariness, Arbitration, Arbor