barbed wire
US /ˌbɑːrbd ˈwaɪər/
UK /ˌbɑːrbd ˈwaɪər/
1.
wire with clusters of short, sharp spikes set at intervals along it, used to make fences or in warfare as an obstruction.
:
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The farmer put up barbed wire around his property to keep intruders out.
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During the war, soldiers used barbed wire to create defensive barriers.