one who, or that which, molds or forms into shape; specifically (founding), one skilled in the art of making molds for castings.-to crumble into small particles; to turn to dust by natural decay; to lose form, or waste away, by a gradual separation of the component particles, without the presence of water; to crumble away.-to turn to dust; to cause to crumble; to cause to waste away.-alt. of mouldy