sliding door

a door made in one rigid piece and designed to close an entire opening. The door is opened by sliding it horizontally to one side and may be constrained by overhead rollers and track with bottom guide, or bottom rollers and track with overhead guide. See Figure 4.5

door that operates horizontally on the face of a wall or within a cavity, with the weight of the door being taken either on top or bottom tracks
See Figure A.35

sliding door