Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
fixedness is a noun meaning "remaining in place". It carries 3 recorded senses.
remaining in place
the quality of being fixed in place as by some firm attachment
the quality of being fixed and unchangeable
“the fixedness of his gaze upset her”
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 fixedness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.