1. In law, an action or deed performed in accordance with legal requirements and moral principles, which does not violate any laws or regulations
The contract was considered a lawful act by the court.
O contrato foi considerado um ato legítimo pela corte.
2. An action that is authorized by law and carried out with proper legal authority
The police officer's arrest was a lawful act within their jurisdiction.
A prisão do policial foi um ato legítimo dentro de sua jurisdição.