transitive. To overlay, point or edge with steel. Often in passive to be (well) steeled.

To protect (the point, edge or face of a thing, esp. something made of timber) with a plate, rim, ferrule or sheath of metal, etc.

transitive. To plate or cover (an object or part of an object) in order to provide protection or reinforcement. Often with with. Now somewhat rare.

To arm or protect with an iron plate or clout.

transitive. To treat, produce, or transform by (or as if by) alchemy; (in early use) spec. †to plate or alloy with another metal (obsolete). Now…