Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
multifactorial is an adjective meaning "involving or depending on several factors or causes (especially pertaining to a condition or disease resulting from the interaction of many genes)". It carries one recorded sense.
involving or depending on several factors or causes (especially pertaining to a condition or disease resulting from the interaction of many genes)
Definitions, synonyms and semantic relations for multifactorial come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.