to unite or fuse (as pieces of metal) by hammering, compressing, or the like, especially after rendering soft or pasty by heat, and sometimes with the addition of fusible material like or unlike the pieces to be united.
to bring into complete union, harmony, agreement, etc.
verb (used without object)
to undergo welding; be capable of being welded:
a metal that welds easily.
a welded junction or joint.
the act of welding or the state of being welded.
1590-1600; variant of well2 in obsolete sense “to boil, weld”