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English thesaurus
barrier ['bærɪə] n
metrol.	An electrical device that separates two circuits, e.g. an intrinsically safe circuit from a non-intrinsically safe circuit
mil., abbr.	bar; barr
mil., logist.	A coordinated series of obstacles designed or employed to detect, channel, direct, restrict, delay or stop the movement of an opposing force, and to impose additional losses in personnel, time and equipment on the opposing force. (FRA); Coherent set made up of planned obstacles, general diverse in nature, and laid within a large and deep area facing a probable enemy direction of approach. (FRA)
USA	A coordinated series of natural or man-made obstacles designed or employed to channel, direct, restrict, delay, or stop the movement of an opposing force and to impose additional losses in personnel, time, and equipment on the opposing force (JP 3-15)