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
2. To mend; to patch up. "To
solder up a broken cause." Hooker.
Sol"der (?), n. [Formerly soder;
F. soudure, OF. soudeure, fr. OF. & F. souder to
solder, L. solidare to fasten, to make solid. See Solid,
and cf. Sawder.] A metal or metallic alloy used when
melted for uniting adjacent metallic edges or surfaces; a metallic
cement. 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.