1. plural of stupidness; instances or examples of being stupid; foolish acts or behaviors
Usage: rare; formal plural form

Examples

• The committee discussed the various stupidnesses that led to the project’s failure.
• His repeated stupidnesses cost him the promotion.
• The book cataloged the stupidnesses of historical leaders.
• She was tired of witnessing the daily stupidnesses at work.
• The professor pointed out the stupidnesses in the student’s argument.