Definition of "mental disorder" [mental disorder]

• 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.

• "Irritability, depression and sensitiveness, incomprehensible confidence and desire to undertake various tasks, pronounced selfishness, sexual excitement and jealousy are the traits of mental disorder in tuberculosis."
• "Pronounced mental disorder occurs rarely in tuberculosis, according to Ziehen, and leads either to melancholia or to hallucinatory states of excitement, resembling the deliria of exhaustion or inanition."
• "There were no signs of self-neglect indicative of mental disorder or drug dependency of any kind."