razor blade

Definitions

1. A thin piece of steel with a sharp edge that can be fitted into a razor.
2. A replaceable cartridge in which razor blades are set, fitted into a razor.
3. A 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).
   broadly

Equivalents

CEFR level