(1):

(n.) 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):

(n.) To mend; to patch up.

(3):

(n.) anything which unites or cements.

(4):

(n.) A metal or metallic alloy used when melted for uniting adjacent metallic edges or surfaces; a metallic cement.