1. the quality of being willing to take bold risks or act with daring confidence
2. the quality of being rude or disrespectful in a shocking way

Examples

• The entrepreneur’s audaciousness led her to start three companies before age 25.
• His audaciousness in challenging the established theory impressed his professors.
• The audaciousness of the theft shocked the entire neighborhood.
• She admired the audaciousness of the mountain climbers who attempted the dangerous route.
• The student’s audaciousness in questioning the principal’s decision surprised everyone.
• The audaciousness of his lies eventually caught up with him.
• Their audaciousness in proposing such a radical solution paid off in the end.