Cornice

[Sarah]

Any horizontal, molded or otherwise decorated projection whichcrowns or finishes the part to which it is affixed; as, the corniceof an order, pedestal, door, window, or house. Gwilt. Cornice ring,the ring on a cannon next behind the muzzle ring.

[Sarah]

Butthole

[Monty]

An ornamental moulding round the wall of a room just below the ceiling.

[Michiko]

Cornice in Weather Forecast. An overhanging ridge of snow.

[Mark Zuckerberg]

a decorative border found where the ceiling meets the walls in some rooms and also along the top of some walls and buildings