up Barrier or barrier in Wiktionary, the free dictionary. A barrier or barricade is a physical structure which blocks or impedes something. Barrier may...

The Great Barrier Reef is the world's largest coral reef system, composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres...

Israeli barrier may refer to: Israel–Gaza barrier Israeli West Bank barrier Israel–Egypt barrier This disambiguation page lists articles associated with...

The Thames Barrier is a retractable barrier system built to protect the floodplain of most of Greater London from exceptionally high tides and storm surges...

The sound barrier or sonic barrier is the large increase in aerodynamic drag and other undesirable effects experienced by an aircraft or other object when...

The blood–brain barrier (BBB) is a highly selective semipermeable border of endothelial cells that regulates the transfer of solutes and chemicals between...

The Barrier is a lava dam retaining the Garibaldi Lake system in southwestern British Columbia, Canada. It is over 300 m (980 ft) thick and about 2.4 km...

The Steel And Foam Energy Reduction Barrier (SAFER Barrier), sometimes generically referred to as a soft wall, is a technology found on oval automobile...

Schottky barrier, named after Walter H. Schottky, is a potential energy barrier for electrons formed at a metal–semiconductor junction. Schottky barriers have...

Barrier islands are a coastal landform, a type of dune system and sand island, where an area of sand has been formed by wave and tidal action parallel...

A vapor barrier (or vapour barrier) is any material used for damp proofing, typically a plastic or foil sheet, that resists diffusion of moisture through...

A Jersey barrier, Jersey wall, or Jersey bump is a modular concrete or plastic barrier employed to separate lanes of traffic. It is designed to minimize...

Michael J. Barrier (born June 15, 1940) is an American animation historian. Barrier was the founder and editor of Funnyworld (October 1966 – Spring 1983)...

The Gaza–Israel barrier (sometimes called the Iron Wall) is a border barrier located on the Israeli side of the Gaza–Israel border. Before the Israel–Hamas...

In constrained optimization, a field of mathematics, a barrier function is a continuous function whose value increases to infinity as its argument approaches...

diffusion barrier is a thin layer (usually micrometres thick) of metal usually placed between two other metals. It is done to act as a barrier to protect...

Light barrier may refer to: The theoretical maximum speed that any physical object or information can travel at – the speed of light An opto-electronic...

Veurne Knokke Ypres Menen Tournai Mons Dendermonde Namur The Barrier Treaties (Dutch: Barrièretraktaat/Barrièreverdrag; French: traités de la Barrière)...

Traffic barriers (known in North America as guardrails or guard rails, in Britain as crash barriers, and in auto racing as Armco barriers) keep vehicles...

The Barrier Ranges or sometimes the Barrier Range and historically the Stanley's Barrier Range, is a mountain range that comprises a series of hills and...

is a CSF-brain barrier at the level of the pia mater, but only in the embryo. Similar to the blood–brain barrier, the blood–CSF barrier functions to prevent...

The terms barrier ridge, a term of art in the earth sciences, especially geology and sometimes barrier range (more common as a geography term) describing...

A barrier vehicle (BV), barrier wagon, match wagon or translator coach is used to convert between non-matching railway coupler types. This allows locomotives...

The blood–air barrier or air–blood barrier, (alveolar–capillary barrier or membrane) exists in the gas exchanging region of the lungs. It exists to prevent...

In computing, a memory barrier, also known as a membar, memory fence or fence instruction, is a type of barrier instruction that causes a central processing...

A biological barrier is a natural selectively permeable membrane that protects certain organs or tissues by allowing some substances to pass through them...

A flood barrier, surge barrier or storm surge barrier is a specific type of floodgate, designed to prevent a storm surge or spring tide from flooding...

The Coulomb barrier, named after Coulomb's law, which is in turn named after physicist Charles-Augustin de Coulomb, is the energy barrier due to electrostatic...

Barrier Lake is a man-made reservoir at the north end of Kananaskis Country in Alberta, Canada. Highway 40 runs between the lake and Mount Baldy, on the...

A border barrier, border fence or border wall is a separation barrier that runs along or near an international border. Such barriers are typically constructed...