Definitionen
1.NounA thin piece of steel with a sharp edge that can be fitted into a razor.
2.NounA replaceable cartridge in which razor blades are set, fitted into a razor.
3.NounA thin interchangeable blade for a utility knife (especially, that of a Stanley knife) that is similar to a razor blade stricto sensu (in size, thinness, and sharpness).
4.VerbAlternative form of razor-blade.