MANSARD

mansard

(adjective) (of a roof) having two slopes on all sides with the lower slope steeper than the upper; “the story formed by a mansard roof is usually called the garret”

mansard, mansard roof

(noun) a hip roof having two slopes on each side

Source: WordNet® 3.1

Etymology

Adjective

mansard

(of a roof) having two slopes on each side, the lower being steeper than the upper

Noun

mansard (plural mansards)

A mansard roof

The upper storey of a building, surrounded by such a roof

Source: Wiktionary