Cladding

n. act of covering with a protective layer; act of bonding one layer of metal to another

v. cover with a protective layer, bond one layer of metal to another

Cladding is the covering of one material with another. It has different meanings depending on the context.
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Noun
1. a protective covering that protects the outside of a building
(synonym) facing
(hypernym) protective covering, protective cover, protection
(hyponym) revetment, revetement, stone facing

1. Of an optical fiber, one or more layers of material of lower refractive index, in intimate contact with a core material of higher refractive index. (188 ) 2. A process of covering one metal with another (usually achieved by pressure rolling, extruding, drawing, or swaging) until a bond is achieved. (188 )

The thin-walled metal tube that forms the outer jacket of a nuclear fuel rod. It prevents corrosion of the fuel by the coolant and the release of fission products into the coolant. Aluminum, stainless steel, and zirconium alloys are common cladding materials.