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