dormer Meaning, Definition & Usage

noun a gabled extension built out from a sloping roof to accommodate a vertical window
dormer window.

Literally, the window of a sleeping apartment. F. dormir to sleep. See Dormant, a. & n.

(Arch.) A window pierced in a roof, and so set as to be vertical while the roof slopes away from it. Also, the gablet, or houselike structure, in which it is contained.