Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
mundaneness is a noun meaning "the quality or character of being intellectually sophisticated and worldly through cultivation or experience or disillusionment". It carries 2 recorded senses.
the quality or character of being intellectually sophisticated and worldly through cultivation or experience or disillusionment
the quality of being commonplace and ordinary
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for mundaneness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.