n. The contraction of a material to a smaller surface or bulk, whether by cooling after being heated, as a metal, or by drying, as timber or clay, or by wetting, as cord or fabrics.n. Figuratively, a similar reduction of any kind, as loss of weight; especially, loss of value: as, shrinkage in real estate.n. Amount of diminution of surface or bulk, weight or value: as, the shrinkage of cast-iron by cooling is one eighth of an inch to a foot; the shrinkage on the goods was 10 per cent.n. In gunnery, the difference between the outside diameter of the inner cylinder and the inside diameter of the outer cylinder of a built-up gun.n.