master-at-arms

mas·ter-at-arms

(măs′tər-ət-ärmz′)n. pl. mas·ters-at-arms (măs′tərz-) A petty officer assigned to maintain order.

master-at-arms

n, pl masters-at-arms (Nautical Terms) the senior rating, of Chief Petty Officer rank, in a naval unit responsible for discipline, administration, and police duties

mas′ter-at-arms′

n., pl. mas•ters-at-arms. 1. a naval petty officer who keeps order aboard ship. 2. an officer of an organization who keeps order. [1740–50]

Thesaurus

Noun

1.

master-at-arms - the senior petty officer; responsible for discipline aboard shipP.O., petty officer, PO - a noncommissioned officer in the Navy or Coast Guard with a rank comparable to sergeant in the Army