a long area of high land, especially at the top of a mountain:
We made our way carefully along the ridge.
something long and thin that is raised above the things around it:
A small ridge of sand separated the field from the beach.
The ridges on the soles give the shoes a better grip.
the part at the top of a roof, where the two sides meet
a long area of high air pressure in the atmosphere, which has an effect on the weather