1. the quality or state of being foolish, silly, or lacking in intelligence or good judgment
Usage: informal; often used to describe someone's behavior or mental capacity in a lighthearted or mildly critical way

Examples

• His halfwittedness was evident when he forgot his own phone number.
• The character's halfwittedness provided comic relief throughout the film.
• She couldn't believe the halfwittedness of his decision to drive without checking the weather.
• The halfwittedness of the plan became obvious once they tried to execute it.
• His halfwittedness didn't prevent him from being a kind and loyal friend.
• The halfwittedness displayed in that comment made everyone laugh.