#movable_barrier__movablebarrier  a barrier that can be moved to allow passage
  supertype:  barrier  a structure or object that impedes free movement
  subtype:  chicane  a movable barrier used in motor racing; sometimes place before a dangerous corner to reduce speed as cars pass in single file
  subtype:  door  a swinging or sliding barrier that will close the entrance to a room or building; "he knocked on the door"; "he slammed the door as he left"
     subtype:  car_door__cardoor  the door of a car
        subtype:  hatchback  a sloping rear car door that is lifted to open
     subtype:  cargo_door__cargodoor  door used to load or unload cargo
     subtype:  double_door  two vertical doors that meet in the middle of the door frame when closed
     subtype:  fire_door  a fire-resistant door that can be closed to stop the spread of a fire
     subtype:  French_door  a light door with transparent or glazed panels extending the full length
        subtype:  French_window  a French door situated in an exterior wall of a building
     subtype:  interior_door  a door that closes off rooms within a building
        subtype:  bi-fold_door  an interior door
        subtype:  folding_door__foldingdoor__accordion_door__accordiondoor  an interior door that opens by folding back in sections (rather than by swinging on hinges)
     subtype:  screen_door__screen  a door that is a screen to keep insects from entering a building through the open door; "he heard the screen slam as she left"
     subtype:  sliding_door__slidingdoor  a door that opens by sliding instead of swinging
        subtype:  barn_door  the large sliding door of a barn
     subtype:  swing_door__swingdoor__swinging_door  a door that swings on a double hinge; opens in either direction
        subtype:  batwing  one of a pair of swinging doors (as at the entrance to a western saloon)
     subtype:  trap_door  a hinged or sliding door in a floor or ceiling
  subtype:  door.movable_barrier  a swinging or sliding barrier that will close off access into a car; "she forgot to lock the doors of her car"
  subtype:  gate  a door-like movable barrier in a fence or wall
     subtype:  head_gate  a gate upstream from a lock or canal that is used to control the flow of water at the upper end
     subtype:  lock-gate  a gate that can be locked
     subtype:  lychgate__lichgate  a roofed gate to a churchyard, formerly used as a temporary shelter for the bier during funerals
     subtype:  portcullis  gate consisting of an iron or wooden grating that hangs in the entry to a castle or fortified town; can be lowered to prevent passage
     subtype:  postern  a small gate in the rear of a fort or castle
     subtype:  tailgate__tailboard  a gate at the rear of a vehicle; can be lowered for loading
     subtype:  tail_gate  a gate downstream from a lock or canal that is used to control the flow of water at the lower end
     subtype:  tollgate__tollbar  a gate or bar across a toll bridge or toll road which is lifted when the toll is paid
     subtype:  turnpike  (from 16th to 19th centuries) gates set across a road to prevent passage until a toll had been paid
     subtype:  turnstile  a gate consisting of a post that acts as a pivot for rotating arms; set in a passageway for controlling the persons entering
     subtype:  wicket_door__wicket__wicket_gate  small gate or door (especially one that is part of a larger door)
     instance:  Dipylon_gate__Dipylon
  subtype:  hatch  a movable barrier covering a hatchway
     subtype:  cargo_hatch__cargohatch  hatch opening into the cargo compartment

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