The passage of a door; entrance way into a house or a room.
the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close; "he stuck his head in the doorway"
a place, distinct from the room or hall on either side
a portal between two STEMs (Space, Time, Energy and Matter intersections/encapsulations)
a unique entry or portal going to a common main site
Vertical plane of room entry and exit. AKA Passage.
1. Opening in a wall meant to be closed by a door. 2. Passageway or entry into a building or room.