a. foolish or silly, especially in self-satisfied way
He is far too intelligent to utter such fatuous remarks.
Sentence in Classic:
Those that come through the gate of ivory are fatuous, but those from the gate of horn mean something to those that see them.
She welcomed the news that Ashley now had a home of his own, so she could remove herself from uncongenial surroundings and also from the distressing sight of her sister so fatuously happy with a man unworthy of her.
Gone With The Wind By Margaret Mitche Context