SOD'ER, verb transitive [It has been taken for granted that this is a contracted word, from Latin solido, and hence written solder. The fact may be doubted; but if true, the settled pronunciation seems to render it expedient to let the contracted orthography remain undisturbed.] To unite and make solid, as metallic substances; to join separate things or parts of the same thing by a metallic substance in a state of fustion, which hardens in cooling, and renders the joint solid. SOD'ER, noun Metallic cement; a metal or metallic composition used in uniting other metallic substances.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI