An umpire; a third arbiter, appointed whenever two arbiters disagree.
An overseer; a superintendent.
An umpire; a third arbiter, appointed when two arbiters, previously chosen, disagree.
An overseer; a superintendent; especially, in Scots law, an umpire appointed by a submission to decide in which two arbiters have differed in viewpoint, or called by the arbiters themselves, under abilities given them by the submitting.
In lawn-bowls, one that determines regarding the worth of an attempt in case of a dispute.