Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
incompleteness is a noun meaning "the state of being crude and incomplete and imperfect". It carries one recorded sense.
the state of being crude and incomplete and imperfect
“the study was criticized for incompleteness of data but it stimulated further research”
“the rawness of his diary made it unpublishable”
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 incompleteness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.