1. Conduct or actions that are not suitable, proper, or acceptable in a given context or social setting
The student's inappropriate behavior in class resulted in detention.
O comportamento inadequado do aluno na aula resultou em detenção.
2. Actions that violate social norms, rules, or expectations of decorum
His inappropriate behavior at the formal dinner offended several guests.
Seu comportamento inadequado no jantar formal ofendeu vários convidados.