Source : Webster's Revised Unabridged Dictionary (1913)

Solder \Sol"der\, v. t. [imp. & p. p. {Soldered}; p. pr. & vb.
   n. {Soldering}.] [Formerlysoder. See {Solder}, n.]
   1. To unite (metallic surfaces or edges) by the intervention
      of a more fusible metal or metallic alloy applied when
      melted; to join by means of metallic cement.

   2. To mend; to patch up. ``To solder up a broken cause.''
      --Hooker.

Soldering \Sol"der*ing\,
   a. & n. from {Solder}, v. t.

   {Soldering iron}, {Soldering tool}, an instrument for
      soldering, consisting of a bit or bolt of copper having a
      pointed or wedge-shaped end, and furnished with a handle.

Source : WordNet®

soldering
     n : fastening firmly together [syn: {bonding}]