A door is usually a swinging or sliding barrier by which an entry is is closed or opened,
and also a similar part of a piece of furniture. A doorjamb is an upright piece
forming the side of a door opening, and a doorknob is a knob or handle that releases
a door latch when turned. A doormat is a mat placed before or inside of a door
for wiping dirt from one's shoes. A doorway is the opening that a door closes,
especially an entrance into a building or a room.