folding door(n = noun.artifact) accordion door - an interior door that opens by folding back in sections (rather than by swinging on hinges);
is a kind of interior door
accordion door, back door, barn door, bi-fold door, car door, cargo door, door, door guard, door latch, door prize, double door, dutch door, exterior door, fire door, folding, folding chair, folding money, folding saw, french door, front door, half door, hatchback door, interior door, louvered door, next door, open door, outside door, protein folding, revolving door, screen door, service door, show the door, side door, sliding door, stage door, storm door, swing door, swinging door, trap door, wicket door