1. An official document that confirms a fact, qualification, or achievement
She received a certificate of completion after finishing the course.
Ela recebeu um certificado de conclusão após terminar o curso.
2. A document issued by an authority or organization as proof of authenticity or quality
The certificate of authenticity guarantees the painting is genuine.
O certificado de autenticidade garante que o quadro é genuíno.
3. Adjective: verified, confirmed, or guaranteed as authentic
This is certified organic produce.
Este é um produto orgânico certificado.