A hard outer or surface layer; (Metallurgy) a coating of a metal resistant to abrasion applied to another, less resistant, metal; the application of such coatings.
Origin
Mid 19th century.
Definition of hard facing in US English:
hard facing
noun
A hard outer or surface layer; (Metallurgy) a coating of a metal resistant to abrasion applied to another, less resistant, metal; the application of such coatings.