Ridge /(rĭj)/

1. The back, or top of the back; a crest.
2. A range of hills or mountains, or the upper part of such a range; any extended elevation between valleys.

   Part rise in crystal wall, or ridge direct.

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

imp. & p. p. Ridged; p. pr. & vb. n. Ridging

1. To form a ridge of; to furnish with a ridge or ridges; to make into a ridge or ridges.

   Bristles ranged like those that ridge the back Of chafed wild boars.

2. To form into ridges with the plow, as land.
3. To wrinkle.