# headwall

> English word · Noun

## Definitions
1. The highest cliff of a glacial cirque.
2. The steep cliff at the back of a cirque.
3. A retaining wall at the outlet of a drain, culvert or tunnel.

## Etymology
From head + wall.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/headwall