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