1. lack of modesty in behavior, dress, or manner; indecency or impropriety
2. excessive pride or arrogance; lack of humility

Examples

• The school dress code was designed to prevent immodesty among students.
• Her immodesty in claiming all the credit for the project annoyed her teammates.
• The actor’s immodesty about his talents made him unpopular with directors.
• Critics accused the politician of immodesty in his victory speech.
• The teacher addressed the issue of immodesty in student behavior during the assembly.
• His immodesty regarding his achievements cost him several friendships.