arbitrator

Definitions of arbitrator
1

n someone chosen to judge and decide a disputed issue

“the arbitrator's authority derived from the consent of the disputants”
Synonyms:
arbiter, umpire
Types:
third party
someone other than the principals who are involved in a transaction
Type of:
evaluator, judge
an authority who is able to estimate worth or quality

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.