Definition of "mental disease" []

• See mental illness. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "(D.S. H. 8605, Path. 568) had an ill-defined attack of mental disease and was in D.S. H. at 29."
• "The study of nervous pathology, of mental disease and of abnormal mental states, such as those of hypnotism and double-consciousness, has also opened up new fields of psychological research, constantly widening with the last thirty years."
• "Ziehen,8 for example, remarks that nephritis brings about mental disease in two ways, -- through vascular changes which very frequently accompany chronic nephritis and other uremic changes in the blood."