Definitions

1. noun

A window in a roof, typically a square window with a hip roof projecting from the slope of the main roof, allowing natural light to enter a room.

“The historic house features several dormers, giving it a charming appearance from the outside.”

2. noun

A small room or a compartment, especially one that is part of a larger structure, such as a ship or a aircraft.

“The aircraft’s cockpit is divided into several dormers, each containing different controls and instruments.”