barrier

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barrier

1. 
a. an exposed offshore sand bar separated from the shore by a lagoon
b. (as modifier): a barrier beach
2. that part of the Antarctic icecap extending over the sea

Barrier

 

(in Russian, zaval), an antitank, antitransport, or anti-infantry obstacle. Barriers are made of lumber, stones, or snow on probable enemy routes of travel in places where it is difficult to bypass them. When setting up a timber barrier, trees of more than 20 cm in diameter are used. They are sawed down at a height of 60–120 cm and piled criss-cross with the crowns facing the enemy. In order to make it difficult to pull the barrier apart, the trees are not completely separated from their stumps; they are secured to them, woven with barbed wire, and also reinforced by the placement of land mines and high-explosive charges. During the Great Patriotic War of 1941–45 timber barriers were used extensively by Soviet troops on the defense in forested regions. Stone barriers are set up in mountains or in populated areas by demolishing cliffs or urban stone structures. Barriers made of snow can be devised in mountain and northern regions. In mining the Russian word zaval signifies the accidental destruction of a large rock mass in a mining excavation that disrupts its normal use.


Barrier

 

a lifting or sliding beam, usually installed at a railroad crossing to stop automobile, cart, and pedestrian traffic prior to the passing of a train. Barriers may be operated manually, mechanically, or automatically. Automatic barriers are operated by signals from the railroad’s automation and remote control systems; signal lights and acoustic devices may be used. The normal position for automatic barriers is the open position; for nonauto-matic barriers it is the closed position.

What does it mean when you dream about a barrier?

A barrier may signify that the dreamer is experiencing some obstacle in an arena of his or her life.

barrier

[′bar·ē·ər]
(ecology)
Any physical or biological factor that restricts the migration or free movement of individuals or populations.
(navigation)
Anything which obstructs or prevents passage of a craft.
(physics)

Barrier

[′bar·ē·ər]
(ordnance)
A passive acoustic detection system for submarines, consisting of hydrophones positioned on the ocean floor and connected by undersea cable to a land-based computer center.

barrier

1. Same as barricade.
2. According to the Architectural Barriers Act, any obstacle to the accessibility of a building by disabled people.

barrier

barrierclick for a larger image
i. As it relates to the sound barrier, it is a barrier to flight encountered by an airplane designed for subsonic speeds when it reaches transonic speeds and meets the turbulence incident of diverse degrees of compressibility. Intense buffet and loss of controls to a varying degree may be experienced at this speed.
ii. A net forming part of an arrester, or crash barrier system meant to arrest forward motion of an aircraft that is likely to overshoot the runway. Normally, the net lies horizontally on the ground and is raised when required. The vertical ropes of the barrier net are made of nylon, which are attached to the steel ropes at the top and the bottom of the barrier net.
References in classic literature ?
The Carrion Caves consist of a series of twenty-seven connecting chambers, and present the appearance of having been eroded by running water in some far-gone age when a mighty river found its way to the south through this single breach in the barrier of rock and ice that hems the country of the pole.
The way was boulder-strewn, as had been that south of the barrier, so that we could see but a short distance ahead of us at any time.
The primary care practitioner has to contend with multiple barriers while trying to initiate appropriate insulin therapy in a timely manner.
Prior Information Notice: Dreplacement of the existing barriers
ROAD safety group the Institute of Advanced Motorists is urging the Government to redesign crash barriers to make them more motorcycle friendly.
THE Government is being urged by road safety group the Institute of Advanced Motorists to redesign crash barriers to make them more motorcycle-friendly.
With promises of huge energy savings, it should come as no surprise that homeowners, business owners, and builders in southern states--where the last two summers have seen record-breaking temperatures--have started incorporating radiant barrier products in their homes Some local governments have even gone so far as to require that all new homes be equipped with radiant barriers.
With promises of huge energy savings, it should come as no surprise that homeowners, business owners, and builders in southern states, where the last two summers have seen records breaking temperatures, have started incorporating radiant barrier products in their homes Some local governments have even gone as far as to require that all new homes be equipped with radiant barriers.
Trade Representative (USTR) issued its latest annual compilation of foreign barriers to trade and investment, reporting that the Bush administration has in place an "aggressive and proactive agenda" for breaking down those barriers to ensure continued economic growth and prosperity.
This article demonstrates why research on immigrant language barriers should account for local variations in the way these barriers are experienced by different immigrant groups.
Although scientific rigor is necessary for the new toxicology to move forward, the scientific and public-interest communities must ensure that inappropriate definitions of rigor, as well as proprietary interests, do not create unnecessary barriers to more effective public health protection.