But in other cases (e.g., a vehicle door) the two sides are radically different.ĭoors may incorporate locking mechanisms to ensure that only some people can open them. In most cases, a door's interior matches its exterior side. The door may be moved in various ways (at angles away from the portal, by sliding on a plane parallel to the frame, by folding in angles on a parallel plane, or by spinning along an axis at the center of the frame) to allow or prevent ingress or egress. Doors are commonly attached by hinges, but can move by other means, such as slides or counterbalancing. Doors are generally made of a material suited to the door's task. Conventionally, it is a panel that fits into the portal of a building, room, or vehicle. A door's essential and primary purpose is to provide security by controlling access to the doorway (portal). The created opening in the wall is a doorway or portal. Various examples of doors throughout the worldĪ door is a hinged or otherwise movable barrier that allows ingress into and egress from an enclosure.
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