Door transom

Door transom

A crossbar separating a door from a light or window that is located above it.

transom

1. A horizontal member, usually of wood or stone, that separates a door from a window, fanlight, or panel above it; sometimes called a transom bar. 2. An operable window hinged to the transom, 1 directly above a door. 3. A crossbar in a window frame that divides a window horizontally. Also see operable transom.