n. Goods which sink when cast into the sea, and remain under water; -- distinguished from flotsam, goods which float, and ligan (or lagan), goods which are sunk attached to a buoy.n. The act of throwing objects from a ship to lighten the load; jettison{1}. See Jettison, 1.n. Anything thrown overboard from a ship, whether floating or not.n. Objects scattered about in a disorderly manner.