What is a passage, hall, or antechamber that connects the outer door to the interior of a house or building called?

The term used to describe a passage, hall, or antechamber that connects the outer door to the interior of a house or building is "vestibule." A vestibule is typically a small space where individuals can transition from the outside environment into the home or building, offering a buffer that can help in regulating temperature and providing a moment of pause before entering the main areas of the structure.

In contrast to a foyer, which is usually a larger and more open area that serves as a welcoming space inside the front door, the vestibule is specifically designed to connect the entrance with the interior. While an entryway may also refer to the area at the entrance, it does not convey the same architectural specificity as a vestibule. A corridor, on the other hand, is generally a long passage that connects different rooms within a building rather than serving as an entry point. Thus, the correct identification of a vestibule highlights its unique function in architectural design.