- a person who unites or fuses pieces of metal by hammering, compressing, or the like, usually after softening them by heat: Our machinists and welders take your metal project from 3D image to the real thing.
- a tool or machine used to unite or fuse pieces of metal: The portable spot welder is connected by a long cable so you can take it to wherever it’s needed.
- a person or thing that unites other people or things harmoniously: She’s a great welder of ideas, writing in a way that revives the best from the past and applies it to today’s issues.
