Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
rat-catcher is a noun meaning "a workman employed to destroy or drive away vermin". It carries one recorded sense.
a workman employed to destroy or drive away vermin
Definitions, synonyms and semantic relations for rat-catcher come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.