A metal or metallic alloy used when melted for uniting adjacent metallic edges or surfaces; a metallic coment. Hence, anything which unites or cements. Hard solder, a solder which fuses only at a red heat, as one composed of zinc and copper, or silver and copper, etc. -- Soft solder, a solder fusible at comparatively low temperatures; as, plumbers' solder, consisting of two parts lead and one part tin, is a soft solder.
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.
To mend; to patch up. "To solder up a broken cause." Hooker.
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