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