Junk. 1. Any remnants or pieces of old cable, used on board ship for making gaskets, mats, points, sennits, etc. 2. A Chinese or Japanese native vessel of burden, usually with three masts and with a short bowsprit fitted on the starboard bow. The shrouds are sometimes only on the windward side. The fore and mainmasts generally have lug-shaped sails made of bamboo; the main-mast has also a cotton top-sail; the mizen, a cotton gaff-sail; and the bowsprit, a jib and sprit-sail.