mental illness
noun
any of the various forms of psychosis or severe neurosis.
mental illnesses
-
pluralof mental illness.plural
The grammatical form denoting more than one person, place, thing, or idea.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The stocks of several companies developing psychedelic treatments for mental illnesses soared in premarket trade on Monday morning after President Donald Trump put his support behind them.
From MarketWatch ● Apr. 20, 2026
There’s no doubt that increasing teen use of social media and smartphones over the last 15 years has coincided with rising levels of depression, anxiety and other mental illnesses.
From The Wall Street Journal ● Mar. 25, 2026
The unit housed incarcerated people who were considered unsafe to live with the general population because of the nature of their offenses, as well as some who had diagnoses for severe mental illnesses.
From Los Angeles Times ● Nov. 13, 2025
The third piece of the Cicero platform is to expand civil commitment laws, which permit the involuntary hospitalization or institutionalization of people with mental illnesses.
From Slate ● Jan. 22, 2025
Both my father and my grandmother believed that Jagu’s and Rajesh’s mental illnesses had been precipitated—even caused, perhaps—by the apocalypse of Partition, its political trauma sublimated into their psychic trauma.
From "The Gene" by Siddhartha Mukherjee
