Naut. rare. Also kuff. [Du. kof.] A clumsy sailing-vessel with two masts, used by the Dutch, Germans, Danes, etc.
1794. Rigging & Seamanship, I. 238. Koffs are Dutch vessels of burthen, with a main and fore mast, and a large spritsail set abaft each.
1858. in Simmonds, Dict. Trade.
1895. Times, 19 Nov., 10/5. Danish kuff Gebrœders Nyhuis is ashore at Thisted.