noun, plural che·neaus, che·neaux [shey-nohz] /ʃeɪˈnoʊz/. Architecture.

an ornamented cresting on a cornice or coping.
a gutter, especially an ornamented one, at the eaves of a building.

Origin of cheneau

< French chéneau, earlier chenau; Old French chenal < Latin canālis canal Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019