CHINEA chine is a (typically) hard-edged angle sometimes used on the bottom of a rail, often at the nose of a long board, characterised by a flat-to-flat transition as shown below. Chines can be deep or shallow, wide or narrow, blended or sharp. Boat hulls often have chines.See also rolled rail. *MikePaler* (Thursday, April 22, 2004, 18:33)