A tall, sharp and craggy rock or mountain.
An upright member, generally ending in a small spire, used to finish a buttress, to constitute a part in a proportion, as where pinnacles flank a gable or spire.
The highest point.
Coordinate term: sea stack
An all-time high; a point of greatest achievement or success.
To place on a pinnacle.
To build or furnish with a pinnacle or pinnacles.
A chain of mountains.
A chain of hills.
The back of any animal; especially the upper or projecting part of the back of a quadruped.
Any extended protuberance; a projecting line or strip.
The line along which two sloping surfaces meet which diverge towards the ground.
A long narrow elevation on an ocean bottom.
The highest portion of the glacis proceeding from the salient angle of the covered way.
An elongated region of high atmospheric pressure.
The highest point on a roof, represented by a horizontal line where two roof areas intersect, running the length of the area.
To form into a ridge
To extend in ridges