1. to act as arbiter upon (a disputed question) : to settle (a dispute between two people or groups) after hearing the arguments and opinions of both. To make an official decision that ends a legal disagreement between people or groups without the need for the disagreement to be solved in court.The Dispute Resolution Center´s goal is to serve the community as a resource for resolving disputes of all kinds. Arbitrate is when a neutral third party helps end a conflict. Arbitrate derives from the Latin arbiter "judge. Please indicate if you are filling out this form as: Authorized Agent. Fiduciary.