Source : Webster's Revised Unabridged Dictionary (1913)

Coppering \Cop"per*ing\, n.
   1. The act of covering with copper.

   2. An envelope or covering of copper.

Copper \Cop"per\, v. t. [imp. & p. p. {Coppered}; p. pr. & vb.
   n. {Coppering}.]
   To cover or coat with copper; to sheathe with sheets of
   copper; as, to copper a ship.