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