The phrase "single arbitrator" refers to a situation where only one person is chosen to settle a dispute between two parties. This person acts as a neutral judge and makes a final decision on the case, providing a binding resolution. Full definition
To be included in Lancaster's Directory of Arbitrators an individual must demonstrate active involvement in labour arbitration in Canada as a consensually appointed neutral single arbitrator or chair of boards of arbitration. (lancasterhouse.com)
Benchmark and Kalanick in recent days have been haggling over who will serve as the single arbitrator, according to two people. (recode.net)
Unless otherwise agreed by the parties, arbitration will be held in Stamford, Connecticut before a single arbitrator mutually agreed upon by the parties, or if the parties can not mutually agree, a single arbitrator appointed by JAMS, and will be conducted in accordance with the rules and regulations promulgated by JAMS unless specifically modified in these Terms. (juicyjuice.com)