arbiter
1. [ noun ] someone with the power to settle matters at will
Synonyms: supreme_authority
Examples:

"she was the final arbiter on all matters of fashion"

Related terms: expert
2. [ noun ] someone chosen to judge and decide a disputed issue
Synonyms: arbitrator
Related terms: mediator third_party intercede
Similar spelling:   Arbeiter
  arbitral
  arbitrate
  arbitrary
  arbitrage
  arbitrator
  arbitrager
  arbitrable
  arrive_at