1. the quality of being improper or inappropriate in behavior, speech, or conduct
2. an improper or inappropriate act or remark

Examples

• The senator’s comments were criticized as an impropriety.
• She was shocked by the impropriety of his behavior at the formal dinner.
• The judge recused himself to avoid any appearance of impropriety.
• Financial improprieties led to the company’s downfall.
• The teacher addressed the impropriety of talking during the exam.
• His casual dress at the wedding was considered an impropriety.
• The ethics committee investigated allegations of impropriety.