connected with or happening in the mind; involving the process of thinking

connected with the state of health of the mind or with the treatment of illnesses of the mind

a mental disorder/illness

He had a history of mental problems.

She was suffering from physical and mental exhaustion.

The analysis of dreams can reveal details of a person's mental state.

(old-fashioned)a mental hospital/patient

My dad will go mental when he finds out.

We were just losing so much money—it was mental.

It was mental, but a brilliant ending to the film.

LEARNit Dictionary