SOLDER

I. noun Etymology: Middle English soudure, from Anglo-French, from souder to ~, from Latin solidare to make solid, from solidus solid Date: 14th century a metal or metallic alloy used when melted to join metallic surfaces, something that unites, II. verb (~ed; ~ing) Date: 15th century transitive verb to unite or make whole by ~, to bring into or restore to firm union , intransitive verb to use ~, to become united or repaired by or as if by ~, ~ability noun ~er noun