Definitions
1.nounThe back of any animal; especially the upper or projecting part of the back of a quadruped.
2.nounAny extended protuberance; a projecting line or strip."The plough threw up ridges of earth between the furrows."
3.nounThe line along which two sloping surfaces meet which diverge towards the ground.
4.nounThe highest point on a roof, represented by a horizontal line where two roof areas intersect, running the length of the area.
5.noun(fortifications) The highest portion of the glacis proceeding from the salient angle of the covered way.
6.nounA chain of mountains.
7.nounA chain of hills.
8.nounA long narrow elevation on an ocean bottom.
9.nounAn elongated region of high atmospheric pressure.