1. A procedure, technique, or approach that has not been officially authorized, sanctioned, or accepted by relevant authorities, institutions, or regulatory bodies
The researcher used an unapproved method that violated laboratory protocols.
O pesquisador utilizou um método não aprovado que violou os protocolos do laboratório.
2. A practice that does not conform to established standards, regulations, or guidelines
The doctor was reprimanded for employing an unapproved method in patient treatment.
O médico foi repreendido por empregar um método não aprovado no tratamento de pacientes.