mental 1
/men"tl/ , 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.
7. Informal. a person with a psychological disorder: a fascist group made up largely of mentals.
[ 1375-1425; late ME mentalis, equiv. to L ment- (s. of mens ) MIND + -alis -AL 1 ]
mental 2
/men"tl/ , adj.
of or pertaining to the chin.
[ 1720-30; ment ( um ) the chin (see MENTUM) + -AL 1 ]