There are several types of sliding doors such as pocket doors arcadia doors and bypass doors.
Sliding door definitin.
Barn door the large sliding door of a barn.
He slammed the door as he left.
Sliding doors can be mounted either on top of a track below or be suspended from a track above and some types disappear in a wall when slid open.
A sliding door is a type of door which opens horizontally by sliding usually parallel to a wall.
Door a swinging or sliding barrier that will close the entrance to a room or building or vehicle.
Sliding door a door that opens by sliding instead of swinging.
He knocked on the door.