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A barrier or barricade is a physical structure which blocks or impedes something.

Barrier may also refer to:




Crowd and noise control[edit]

  • Crowd control barrier, temporary fencing used to keep crowds inside or away from a certain area
  • Noise barrier, walls and other structures used to attenuate noise pollution

Flood control by flood barriers[edit]

  • Thames Barrier, a flood control structure on the River Thames in England
  • Hesco bastion, a dirt-filled wire mesh/cloth container used for flood control and military fortification
  • Breakwater (structure), a barrier created as part of coastal defense or to protect an anchorage from the effects of both weather and longshore drift
  • Vapor barrier, any material used to resist diffusion of moisture through walls, ceilings or floors

In science[edit]


In arts and entertainment[edit]

Other uses[edit]

See also[edit]