Solder word meaning and definition

[noun] an alloy (usually of lead and tin) used when melted to join two metal surfaces
[verb] join or fuse with solder; "solder these two pipes together"

\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.
\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.

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