ETYM Old Eng. welde; akin to Scot. wald, Prov. German waude, German wau, Dan. and Swed. vau, Dutch wouw.
Yellow dye; plant from which it is extracted.
A metal joint formed by softening with heat and fusing or hammering together.

1. To join together by heating, as of metals.
2. To unite closely or intimately.