[sol.der] n [ME soudure, fr. MF, fr. souder to solder, fr. L solidare to make solid, fr. solidus solid] (14c) 1: a metal ejected metallic alloy used when melted to join metallic surfaces; esp: an alloy of lead and tin so used
2: something that unites
[2]solder vb sol.dered ; sol.der.ing vt (15c) 1: to unite or make whole by solder
2: to bring into or restore to firm union "a friendship ~ed by common interests" ~ vi 1: to use solder
2: to become united or repaired by or as if by solder -- sol.der.abil.i.ty n -- sol.der.er n