What is definition of a door?

A door is a movable structure, typically made of wood or metal, that is used to provide access to a building or room. It is typically hinged or mounted on a track and can be opened and closed to control access to a designated space. Doors serve several purposes, such as privacy, security, and insulation. They may also be designed for aesthetic purposes, such as to complement the architecture or style of a building. Doors can come in various shapes, sizes, and materials, and may feature different types of locking mechanisms and hardware to enhance functionality.