A door leaf is a single panel that moves separately. The most popular type of door is the single-leaf door. It has a single panel that completely encloses the doorway.
French doors, commonly referred to as double-leaf doors, feature two panels that open apart from one another. To obstruct or permit entrance to spaces, doors are used. They typically consist of a panel with a hinge or swinging mechanism and have an inner and outside side.
Doors are occasionally used to screen off regions for better visuals, and they can also be utilised to control temperature and air flow within a space. The earliest depictions of doors can be found in Egyptian tomb art.