Etymology Borrowing from Middle French mental, from Late Latin mentālis, from mēns (“mind, disposition; heart, soul”) + -ālis (“-al”, adjectival suffix).
I don't mean all of your friends—only a small proportion—which, however, connects your circle with that deadly, idle, brainless bunch—the insolent chatterers at the opera,[…], the neurotic victims of mental cirrhosis, the jewelled animals whose moral code is the code of the barnyard—!1907 August, Robert W[illiam] Chambers, “The Unexpected”, in The Younger Set, New York, N.Y.: D. Appleton & Company, →OCLC, page 240:
2
Relational Relating to the mind, its activity, or its products as an object of study.
mental science
3
Relational Of or relating to intellectual as contrasted with emotional activity.
mental acuity
4
Relational Of, relating to, or being intellectual as contrasted with overt physical activity.
Irregular bedtimes may disrupt healthy brain development in young children, according to a study of intelligence and sleeping habits. ¶ Going to bed at a different time each night affected girls more than boys, but both fared worse on mental tasks than children who had a set bedtime, researchers found.2013 July 19, Ian Sample, “Irregular bedtimes may affect children's brains”, in The Guardian Weekly, volume 189, number 6, page 34:
5
Relational Relating to spirit or idea as opposed to matter.
the distinction between physical things and mental ideas
6
Of, relating to, or affected by a psychiatric disorder.
a mental patient
7
Relational Intended for the care or treatment of persons affected by psychiatric disorders.
Etymology Borrowing from Middle French mental, from Late Latin mentālis, from mēns (“mind, disposition; heart, soul”) + -ālis (“-al”, adjectival suffix).