A sailing vessel with two masts rigged like the foremast and mizzen-mast of a full-rigged ship.
      
      "A Brig, (contracted from brigantine), is a vessel with two masts, square-rigged on both."—(Charles…
      
      "Brigantine: a square-rigged vessel with two masts and fore and aft mainsail." — Williams, 1889
      
      "Brig, a sailing vessel with two masts rigged like the foremast and mizzen-mast of a full-rigged ship."…