Noun
(geography) The highest cliff of a glacial cirque.
(geology) The steep cliff at the back of a cirque.
(civil engineering) A retaining wall at the outlet of a drain or culvert.
Source: en.wiktionary.orgThe top of the route traversed left across the East Face to avoid a vertical headwall and joined the uppermost part of the Abruzzi route. Source: Internet
Their bodies were later found below the summit headwall. Source: Internet
Slovenia’s Domen Škofic had a chance to match—or best—Megos’s highpoint, as the entire men’s competition came down to the final move on the headwall. Source: Internet
Here she nears the headwall in this year’s Finals as the sun sinks behind the mountains. Source: Internet