A dormer or dormer window is a window that is built upright in a sloping roof. a window built into a roof, so that it sticks out from the roof skylight (dormeor , from dormir; DORMANT). Window set vertically in a structure that projects from a sloping roof. It often illuminates a bedroom. In the late Gothic and early Renaissance periods, elaborate masonry dormers were designed. Dormers were used along with the mansard roof to defy a Parisian law limiting buildings to six stories; the seventh story was called a garret (or attic) and was made habitable by the dormer. See also gable
-A structure that protrudes from a sloping roof and contains a window or group of windows
A projecting structure built out from a sloping roof, usually including one or more windows
Any structure whose framing projects out of a sloping roof to form a vertical wall suitable for windows or other openings