This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Foolish or silly, especially in a smug or self-satisfied way: "'Don't you like the poor lonely bachelor?' he yammered in a fatuous way” ( Sinclair Lewis). See Synonyms at foolish.

adj. Obnoxiously stupid, vacantly silly, content in one's foolishness.

adj. Feeble in mind; weak; silly; stupid; foolish; fatuitous.

adj. Without reality; illusory, like the ignis fatuus.

Foolish; foolishly conceited; feebly or stupidly self-sufficient; unconsciously silly: applied both to persons and to their acts.

Idiotic; demented; imbecile.

Unreal; illusory, like the ignis fatuus.

adj. devoid of intelligence

"I'm surprised that when I looked up the word fatuous in the dictionary, your name and picture weren't next to it."

foolish   

fatuity    fatuously    fatuousness   

weak    silly    stupid    foolish    fatuitous    deranged    puerile    childish    insipid    imbecilic   

idiotic    childish    foolish    naive    smug    irrational    maudlin    superstitious    thoughtless    condescend