Pronunciation: (men'tl),[key] —adj. 1. of or pertaining to the mind: mental powers; mental suffering. 2. of, pertaining to, or affected by a disorder of the mind: a mental patient; mental illness. 3. providing care for persons with disordered minds, emotions, etc.: a mental hospital. 4. performed by or existing in the mind: mental arithmetic; a mental note. 5. pertaining to intellectuals or intellectual activity.
6. Informal.slightly daft; out of one's mind; crazy: He's mental.
—n. Informal.a person with a psychological disorder: a fascist group made up largely of mentals.
Pronunciation: (men'tl),[key] —adj. of or pertaining to the chin.