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