- anteroom: a large entrance or reception room or area
- An antechamber (also known as an anteroom or ante-room) is a smaller room or vestibule serving as an entryway into a larger one. The word is formed of the Latin ante camera, meaning "room before".
- (10) -- a room which leads to the chief room of a building (Oxford Dict.)
- A small auxiliary combustion-chamber, used in some compression-ignition engines, in which partial combustion of the fuel is used to force the burning mixture into the cylinder, so promoting more perfect combustion.
- a chamber or room that serves as a waiting room and entrance to a larger room or an apartment
- An antechamber is a small side room connected to a larger one. There are several small antechambers mentioned. One is connected to the Entrance Hall, across from the Great Hall. ...
- An entrance, vestibule, or foyer.