the back, or top of the back; a crest.-a range of hills or mountains, or the upper part of such a range; any extended elevation between valleys.-a raised line or strip, as of ground thrown up by a plow or left between furrows or ditches, or as on the surface of metal, cloth, or bone, etc.-the intersection of two surface forming a salient angle, especially the angle at the top between the opposite slopes or sides of a roof or a vault.-the highest portion of the glacis proceeding from the salient angle of the covered way.-to form a ridge of; to furnish with a ridge or ridges; to make into a ridge or ridges.-to form into ridges with the plow, as land.-to wrinkle.