Submitted by György Chityil ... on Fri, 01/19/2018 - 20:21 Hierarchy: NounDescription: {{US|Navy}} A petty officer responsible for law enforcement, antiterrorism, force protection, and expeditionary warfare.Ngram: master-at-armsNgram Text: master-at-armsSource: WiktionaryIssue: 0Wiktionary tag: navyNgram Count: 1