headwall

  1. Noun.  (geography) The highest cliff of a glacial cirque.
  2. Noun.  (geology) The steep cliff at the back of a cirque.
  3. Noun.  (context, civil engineering) A retaining wall at the outlet of a drain or culvert.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.