Meanings
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1
noun
the quality or state of being foolish, especially in a complacent or self-satisfied way
The proposal's confident tone could not conceal its underlying fatuity.
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2
noun
a foolish remark, idea, or action
The conversation dissolved into boasts and cheerful fatuities.
Thesaurus
Etymology
Borrowed through Middle French fatuité from Latin fatuitas ("foolishness, stupidity"), from fatuus ("foolish, silly"). Fatuity names either the quality expressed by fatuous behavior or a particular foolish act or remark.