1. a person whose job is to join pieces of metal together by heating and melting them
2. a machine or tool used for welding metal

Examples

• The welder put on protective gear before starting work.
• She trained for two years to become a certified welder.
• The construction crew hired an experienced welder for the steel frame.
• He bought a new welder for his home workshop.
• The welder sparked as it joined the metal pieces together.
• Many welders work in shipyards and factories.
• The portable welder made it easy to work on-site.