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.
Hayden Panettiere and Lindsay Clancy are drawing heightened attention to maternal mental illnesses.
From The Wall Street Journal ● Aug. 26, 2026
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
Fatigue, brain fog, headaches, and joint pain can be caused by anemia, sleep disorders, mental illnesses, arthritis, multiple sclerosis, lupus, ALS, fibromyalgia, cancer, and many other conditions.
From Slate ● Dec. 19, 2025
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
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
