The term razor wire refers to a type of fence wire that is composed of sharp-edged blades. This type of wire is commonly used in correctional facilities, industrial settings, and military bases to provide extra security and prevent unauthorized access. Synonyms for razor wire include barbed wire, concertina wire, and wire mesh. Barbed wire is a type of fencing material that features sharp, pointed edges arranged along the length of the wire. Concertina wire is a type of razor wire that is formed into a series of coils, whereas wire mesh is a type of woven wire fencing that features small openings in the mesh for improved visibility.