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mental illness
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noun
any of the various forms of psychosis or severe neurosis.
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Also called mental disorder, mental disease .
Origin of mental illness
First recorded in 1960–65
Words nearby mental illness
mentalese, mental handicap, mental healing, mental health, mental home, mental illness, mental impairment, mentalism, mentalist, mentality, mental lexicon
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use mental illness in a sentence
British Dictionary definitions for mental illness
mental illness
noun
any of various disorders in which a person's thoughts, emotions, or behaviour are so abnormal as to cause suffering to himself, herself, or other people
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for mental illness
mental illness
[ mĕn′tl ]
Any of various psychiatric disorders or diseases, usually characterized by impairment of thought, mood, or behavior.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.