1. to violate or disobey established rules, regulations, or laws
The student broke the rules by using a phone during the exam.
O aluno quebrou as regras ao usar um telefone durante a prova.
2. to act in a way that goes against established norms or expectations
She broke the rules by wearing casual clothes to the formal dinner.
Ela quebrou as regras ao usar roupas casuais para o jantar formal.