Noah Webster's New International Dictionary of the English Language

1. (v. t.) To hear and decide; as, to arbitrate a disputed case.

2. (v. t.) To decide, or determine generally.

3. (v. i.) To decide; to determine.

4. (v. i.) To act as arbitrator or judge; as, to arbitrate upon several reports; to arbitrate in disputes among neighbors; to arbitrate between parties to a suit.