Main Entry: ¹sol·der

Pronunciation: \ˈsä-dər, ˈsȯ-, British also ˈsäl-dər, ˈsōl-\

Function: noun

Etymology: Middle English soudure, from Anglo-French, from souder to solder, from Latin solidare to make solid, from solidus solid

Date: 14th century

1 : a metal or metallic alloy used when melted to join metallic surfaces; especially : an alloy of lead and tin so used
2 : something that unites