A portal of entry into a building, room, or vehicle, consisting of a rigid plane movable on a hinge. Doors are frequently made of wood or metal. May have a handle to help open and close, a latch to hold the door closed and a lock that ensures the door cannot be opened without the key.
Any flap, etc. that opens like a door.
(immigration) An entry point.
A means of approach or access.
A barrier.
A software mechanism by which a user can interact with a program running remotely on a bulletin board system. See BBS door.
To cause a collision by opening the door of a vehicle in front of an oncoming cyclist or pedestrian.