Definitions

1. noun

The state or quality of being foolish or absurdly silly.

“The character’s fatuity in the comedy was a deliberate choice by the writer.”

2. noun

A silly or absurd notion or idea.

“His fatuity about the new business venture was laughable.”

3. noun

The quality of being foolish or lacking in good sense.

“The fatuity of the characters in the play was a recurring theme.”