Arbitrator (noun)

1. A person who is chosen to make a decision or to settle a dispute between two or more parties.
2. A neutral third party who is authorized to make a binding decision in a dispute.

Origin:

From the latin word arbitrator meaning "a person who makes a decision or gives a judgement".

Examples:

1. The arbitrator listened to both sides of the dispute before making a decision.
2. The word "arbitrator" comes from the Latin word arbitrator meaning "a person who makes a decision or gives a judgement".
3. The labor union and management agreed to use an arbitrator to settle their contract dispute.
4. The arbitrator's decision was final and binding.
5. He was appointed as the arbitrator to decide the dispute.