Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
fatuously is an adverb meaning "vacuously or complacently and unconsciously foolish". It carries one recorded sense.
vacuously or complacently and unconsciously foolish
Definitions, synonyms and semantic relations for fatuously come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. .