arbiter
noun
[ ˈɑːbɪtə ]
• a person who settles a dispute or has ultimate authority in a matter.
• "the Secretary of State is the final arbiter"
Similar:
adjudicator,
arbitrator,
judge,
umpire,
referee,
assistant referee,
linesman,
line judge,
mediator,
conciliator,
intervenor,
intercessor,
go-between,
negotiator,
peacemaker,
Origin:
late Middle English: from Latin, ‘judge, supreme ruler’.
