Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
spot-welder is a noun meaning "a welder who does spot welding". It carries one recorded sense.
a welder who does spot welding
Definitions, synonyms and semantic relations for spot-welder come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.