n. The act of stopping or occluding a cavity or opening by means of a plug; as applied to an artery, occlusion of the vessel by means of a blood-clot or thrombus.n. Wood or metal from which plugs or bungs are to be made.n. Plugs collectively; specifically, wooden pins inserted in brick- or stonework, to which battens are nailed.n. The act of testing a melon or a cheese by taking a plug from it.n. The act of hitting with a ball or bullet.n. Hard study; cramming.