Definitions of steel:

noun: knife sharpener consisting of a ridged steel rod
noun: an alloy of iron with small amounts of carbon; widely used in construction; mechanical properties can be varied over a wide range
noun: a cutting or thrusting weapon with a long blade
verb: cover, plate, or edge with steel
verb: get ready for something difficult or unpleasant
name: A surname (rare: 1 in 33333 families; popularity rank in the U.S.: #4484)