1. A person's condition with regard to their psychological and emotional well-being; the state of one's mind and emotional functioning
Mental health is just as important as physical health.
A saúde mental é tão importante quanto a saúde física.
2. The field of medicine and psychology concerned with the diagnosis, treatment, and prevention of mental and emotional disorders
She works in mental health services.
Ela trabalha nos serviços de saúde mental.