A steep slope or precipice rising at the head of a valley or glacial cirque.
noun 1. a cliff or steep slope rising at one end of a glaciated valley.
/ˈhɛdwəd/ adjective 1. (of river erosion) cutting backwards or upstream above the original source, which recedes adverb 2. a variant of headwards
/ˈhɛdwədz/ adverb 1. backwards beyond the original source: a river erodes headwards
[hed-waw-terz, -wot-erz] /ˈhɛdˌwɔ tərz, -ˌwɒt ərz/ plural noun 1. Sometimes, headwater. the upper tributaries of a river. /ˈhɛdˌwɔːtəz/ plural noun 1. the tributary streams of a river in the area in which it rises; headstreams n. 1530s; see head (n.) + water (n.).