The Collaborative International Dictionary
Oversman
Oversman \O"vers*man\, n.; pl. Oversmen.
An overseer; a superintendent.
(Scots Law) An umpire; a third arbiter, appointed when two arbiters, previously selected, disagree.
Wiktionary
oversman
n. 1 An overseer or superintendent. 2 (context Scotland legal English) An umpire; a third arbiter, appointed when two arbiters disagree.