Ridge

1. n. The highest portion of the glacis proceeding from the salient angle of the covered way.
2. n. The back, or top of the back; a crest.
3. n. A range of hills or mountains, or the upper part of such a range; any extended elevation between valleys.
4. 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.
5. 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.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.