Definition of: solder

(sod′ər) noun
1. A fusible metal or alloy used for joining metallic surfaces or margins: applied in a melted state, either as a hard solder, melting only at a red heat, or as a soft solder, melting below a red heat.
2. Anything that unites or cements.
—v.t.
1. To unite or repair with solder.
2. To join together; bind.
—v.i.
3. To work with solder.
4. To be united by or as by solder. [<OF soldure <souder make hard <L solidare <solidus firm, hard]
—sol′der·er noun