door
noun
1.
a swinging or sliding barrier that will close the entrance to a room or building or vehicle
2.
the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close
3.
anything providing a means of access (or escape)
4.
a structure where people live or work (usually ordered along a street or road)
5.
a room that is entered via a door