|Origin:||Late Latin mentalis, from Latin mens 'mind'|
men‧tal S2 W2
1 [only before noun]MP
relating to the health or state of someone's mind [↪ psychiatric]:
The centre provides help for people suffering from mental illness.
Stress has an effect on both your physical and mental health.
2 [only before noun]MP
relating to the mind and thinking, or happening only in the mind:
a child's mental development
You need to develop a positive mental attitude.
mental picture/image (=a picture that you form in your mind)
I tried to get a mental picture of him from her description.
to make a special effort to remember something:
Sarah made a mental note to ask Janine about it later.
a difficulty in remembering something or in understanding something:
I got a complete mental block as soon as the interviewer asked me a question.
5 British English spoken informal
to get very angry
to start behaving in an uncontrolled or excited way
6 [not before noun] British English informal
thinking or behaving in a way that seems crazy or strange:
He must be mental!
She's obviously mentally ill.