Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
factualness is a noun meaning "the quality of being actual or based on fact". It carries one recorded sense.
the quality of being actual or based on fact
“the realm of factuality must be distinguished from the realm of imagination”
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 factualness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.