Pile. [From Latin pi/us, hair] Nap of a regular and closely set kind, consisting of threads standing close together, and shaved smooth, so as to form a uniform and even surface. In dry goods parlance the term is generally confined to the surface-covering of fabrics which is woven in loops and afterward either left standing thus or sheared down to a certain height, as in velvet, plush and various kinds of carpets. [See Nap]