Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
nonconscious is an adjective meaning "concerning mental functioning that is not represented in consciousness". It carries 2 recorded senses.
concerning mental functioning that is not represented in consciousness
“nonconscious psychic processes”
relating to the lack of consciousness of inanimate things
Definitions, synonyms and semantic relations for nonconscious come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.