Definition of "mental"

(relational) Of or relating to the mind or specifically the total emotional and intellectual response of an individual to external reality.

1. Of or relating to intellectual as contrasted with emotional activity.  examples

2. Of, relating to, or being intellectual as contrasted with overt physical activity.  quotations  examples

   Quotations

   • 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

3. Occurring or experienced in the mind.  quotations  examples

   Quotations

   • 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, page 240

4. Relating to the mind, its activity, or its products as an object of study.  examples

5. Relating to spirit or idea as opposed to matter.  examples

Of, relating to, or affected by a psychiatric disorder.

1. (relational) Intended for the care or treatment of persons affected by psychiatric disorders.  examples

2. (colloquial, UK, Ireland, Australia, New Zealand, dated in the US, Canada, comparable) Mentally disordered; insane, mad, crazy.  examples

(colloquial, UK, Ireland, Australia, New Zealand, comparable) Enjoyable or fun, especially in a frenetic way.  examples

Of or relating to telepathic or mind-reading powers.  examples

(anatomy, relational) Of or relating to the chin or median part of the lower jaw, genial.  examples

(biology, relational) Of or relating to the chinlike or liplike structure.

(zootomy) A plate or scale covering the mentum or chin of a fish or reptile.  examples