Entry 3 senses · 2 variants Webster, 1913 Welder /wĕl'-dẽr/ · Weld·er · IPA /ˈwɛldə(ɹ)/ n. n. 01 n. One who welds, or unites pieces of iron, etc., by welding. 1. One who welds, or unites pieces of iron, etc., by welding. 02 n. One who welds, or wields. 1. One who welds, or wields.[Obs.] 2. A manager; an actual occupant.[Ireland. Obs.]