Search Result for "master-at-arms": 
Wordnet 3.0

NOUN (1)

1. the senior petty officer; responsible for discipline aboard ship; 



The Collaborative International Dictionary of English v.0.48:

master-at-arms \master-at-arms\ n. (Naut.)
   The senior petty officer of a ship, responsible for
   discipline aboard the ship.
   [WordNet 1.5]


WordNet (r) 3.0 (2006):

master-at-arms
    n 1: the senior petty officer; responsible for discipline aboard
         ship