1. (n.) The back, or top of the back; a crest.

2. (n.) A range of hills or mountains, or the upper part of such a range; any extended elevation between valleys.

3. (n.) 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.

4. (n.) 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.

5. (n.) The highest portion of the glacis proceeding from the salient angle of the covered way.

6. (v. t.) To form a ridge of; to furnish with a ridge or ridges; to make into a ridge or ridges.

7. (v. t.) To form into ridges with the plow, as land.

8. (v. t.) To wrinkle.