Longman Dictionary of Contemporary English
razor wire
noun
EXAMPLES FROM CORPUS
▪ The following day 20 protesters climbed back over the razor wire.
▪ The gear is protected by a cyclone fence topped with razor wire.
▪ The high grey wall has a lip trimmed with razor wire.
▪ The inmates are held in a compound encircled by razor wire.
▪ There were fences with spirals of razor wire on top.
▪ They gazed into my torch beam like cons caught in razor wire.
Wiktionary
razor wire
alt. A form of secure wire similar to barbed wire, but with a series of short blades instead of barbs. ''Also'', a length thereof. n. A form of secure wire similar to barbed wire, but with a series of short blades instead of barbs. ''Also'', a length thereof.
Usage examples of "razor wire".
After several more throws that showed he was starting to get the idea, Lo picked up another rock and flung it out over the razor wire into the field.
She went after the razor wire in his throat first When it snapped, he sucked in his breath hard and shuddered in place.
Only the great suspension cables remain far above, ringed about with razor wire and frictionless gel.