In physical geography and geology the headwall of a glacial cirque is its highest cliff. In civil engineering, a headwall is a small retaining wall placed at the outlet of a stormwater pipe or culvert. ...
The upper section of a mountain where the terrain is set off from that below by being more steep.
Support structure at the entrance to a culvert or drainage structure.
A steep to vertical cliff found at the end of a valley; often the uppermost part of a Cirque.
A steep cliff, usually the uppermost part of a cirque.
a steep cliff, usually the uppermost part of a cirque .
Precipice at the edge of a glacial cirque, or any steep slope at the head of a valley.