barrier


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Wikipedia.
Related to barrier: Barrier methods

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 great and striking influence which barriers of every kind have had on distribution, is intelligible only on the view that the great majority of species have been produced on one side alone, and have not been able to migrate to the other side.
The assailants have won the barriers, have they not?
Since barrier screws are being used in so many applications, it's important to understand all the variables controlling their performance.
In some places on the edge of the highway in violation of any applicable barrier is missing.
While crash barriers have saved the lives of thousands of drivers, hitting a crash barrier is a factor in eight to 16 per cent of rider deaths, warns the IAM.
Most UK crash barriers are designed to protect car drivers and passengers when a car hits a barrier, redirecting a car away from a hazard and slowing it down over a short distance while the car, seat belts and airbags help to minimise injury.
Manufacturers of these products claim that installing a radiant barrier on the underside of the roof decking can reduce energy consumption and save consumers as much as 25 percent on their air-conditioning costs annually.
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.
VALENCIA - A barrier to block terrorists from dams and other remote locations has been developed by Valencia-based Delta Scientific, which sells counterterrorist devices worldwide.
One frequently mentioned technical barrier was the high cost of generating the data necessary to understand, standardize, and validate toxicogenomics results and methods.
Time travel was once considered only the realm of science fiction: in Breaking The Time Barrier, Jenny Randles reveals recent experiments which are showing the time barrier may indeed be broken.
They will restrain a vehicle hitting the barrier at 50 miles per hour.