#barrier a structure or object that impedes free movement
supertype: #obstructor__obstruction__obstructer__impediment__impedimenta any structure that makes progress difficult
subtype: #bannister__banister__balustrade__balusters__baluster__handrail a railing at the side of a staircase or balcony to prevent people from falling
subtype: #barricade a barrier (usually thrown up hastily so as to impede the advance of an enemy); "they enemy stormed the barricade"
subtype: #breakwater__groin__groyne__mole__bulwark__seawall__jetty a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
subtype: #bulwarks__bulwark a fence-like structure around a deck
subtype: #dike__dam__dyke__levee a barrier constructed to contain the flow or water or to keep out the sea
subtype: #Aswan_High_Dam__Aswan_Dam__High_Dam one of the world's largest dams on the Nile River in southern Egypt
subtype: #Hoover_Dam a large dam on the Colorado River in Nevada
subtype: #milldam dam to make a millpond to provide power for a water mill
subtype: #weir a low dam built across a stream to raise its level or divert its flow
subtype: #fencing__fence a barrier that serves to enclose an area
subtype: #backstop a fence or screen (as behind home plate in baseball)
subtype: #chainlink_fence__chainlinkfence a fence of steel wires woven into a diamond pattern
subtype: #hedgerow__hedge a fence formed by a row of closely planted shrubs or bushes
subtype: #privet_hedge hedge of privet plants
subtype: #windbreak hedge or fence of trees designed to lessen the force of the wind and reduce erosion
subtype: #picket_fence__paling a fence made of upright pickets
subtype: #rail_fence a fence (usually made of split logs laid across each other at an angle)
subtype: #worm_fence__snake_fence__snake-rail_fence__Virginia_fence rail fence consisting of a zigzag of interlocking rails
subtype: #stone_wall__stonewall a fence built of rough stones; used to separate fields
subtype: #dry_wall__drywall__dry-stone_wall__drystonewall a stone wall made with stones fitted together without mortar
subtype: #wall.fencing a masonry fence (as around an estate or garden); "the wall followed the road"; "he ducked behind the garden wall and waited"
subtype: #party_wall__partywall a wall erected on the line between two properties and shared by both owners
subtype: #retaining_wall__retainingwall a wall that is built to resist lateral pressure (especially a wall built to prevent the advance of a mass of earth)
subtype: #weir.fencing a fence or wattle built across a stream to catch or retain fish
subtype: #fender.barrier__wing a barrier that surrounds the wheels of a vehicle to block splashing water or mud; "in England they call a fender a wing"
subtype: #mudguard__splashguard a curved piece above the wheel of a bicycle or motorcycle to protect the rider from water or mud thrown up by the wheels
subtype: #grating a barrier that has parallel or crossed bars blocking a passage but admitting air
subtype: #radiator_grille__grille grating that admits cooling air to car's radiator
subtype: #hurdle a light movable barrier that competitors must leap over in certain races
subtype: #movable_barrier__movablebarrier a barrier that can be moved to allow passage
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
subtype: #railing.barrier__rail a barrier consisting of a horizontal bar and supports
subtype: #bar.railing (law) a railing that encloses the part of the courtroom where the the judges and lawyers sit and the case is tried
subtype: #fife_rail the railing surrounding the mast of a sailing vessel
subtype: #safety_rail__guardrail a railing placed alongside a stairway or road for safety
subtype: #taffrail the railing around the stern of a ship
subtype: #revetment a barrier against explosives
subtype: #roadblock__barricade a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc.
subtype: #starting_gate__starting_stalls a movable barrier on the starting line of a race course
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