noun
arbitrator
AR-bi-tray-ter/ˈɑːrbɪtreɪtər/
A neutral person chosen to settle a dispute.
The arbitrator awards the buyer a partial refund for the damaged chair.

Etymology
An arbitrator is literally someone who gives a decision. The selected meaning adds a particular role: the disputing parties choose this person to decide the issue between them.
In context
An arbitration clause generally redirects that entire process into a private system instead You and the company present your case to a neutral third party an arbitrator
More examples
- Both neighbors agree to let an arbitrator settle their property dispute.
- The arbitrator listens to both sides before making a decision.
- The contract requires payment disputes to go before an arbitrator.
Forms
arbitrator · arbitrators
arbitrate verb — To settle disputes as a neutral decision-maker.
arbitration noun — Dispute settlement by a neutral decision-maker.