delirium
Americannoun
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deliriums,
plural
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deliria
plural
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Pathology. a more or less temporary disorder of the mental faculties, as in fevers, disturbances of consciousness, or intoxication, characterized by restlessness, excitement, delusions, hallucinations, etc.
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a state of violent excitement or emotion.
noun
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a state of excitement and mental confusion, often accompanied by hallucinations, caused by high fever, poisoning, brain injury, etc
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violent excitement or emotion; frenzy
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of delirium
1590–1600; < Latin dēlīrium frenzy, equivalent to dēlīr ( āre ) ( see deliration) + -ium -ium
Explanation
Experiencing delirium? Then you're out of your mind and so excited you're hallucinating. Many things can cause delirium, including illness, high stress, and your team winning the World Series after 100 years of trying. Delirium means “madness” in Latin, and for good reason. Patients with high fevers or who suffer severe trauma might experience a state of delirium, full of mental confusion and maybe a little hysteria. And if you’ve ever stayed up all night writing a paper or working hard to meet some deadline, you’ve probably experienced moments of delirium, where you feel crazed and hallucinatory, fueled by sleep deprivation and too much coffee.
Vocabulary lists containing delirium
Their Eyes Were Watching God
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Unit 1: Telling Details
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"An Occurrence at Owl Creek Bridge" by Ambrose Bierce
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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.
See Examples For:
The show once referenced a fast-food item, called the Ribwich, that drives Homer to delirium.
From MarketWatch ● Apr. 29, 2026
Those who’ve managed to come out of this new kind of tech-enabled delirium have learned how vital it is to stay in touch with the natural world and their natural instincts.
From Slate ● Feb. 2, 2026
But even in the delirium of meme-stock trading, Regencell is an outlier.
From The Wall Street Journal ● Jan. 27, 2026
The equaliser sent Tynecastle into an advanced state of delirium.
From BBC ● Jan. 25, 2026
In my delirium I thought he was Mawuli, with plump, still-babyish cheeks.
From "Flying Through Water" by Mamle Wolo
The 4th century church father Jerome called them "deliria."
From Time Magazine Archive
A similar explanation is made readily enough in cases of evident bodily disease, even where mental symptoms are prominent, for it is no longer the custom to speak of demon-possession even in the acute deliria.
From The Journal of Abnormal Psychology, Volume 10 by Various
If stupor be a psychobiological reaction, it should occur, occasionally, in organic conditions just as the deliria of typhoid fever may contain many psychogenic elements.
From Benign Stupors A Study of a New Manic-Depressive Reaction Type by John T. (John Thompson) MacCurdy
During Luther's life and afterwards I rejected these Stoic and Manichean deliria, when Luther and others wrote: All works, good and bad, in all men, good and bad, must occur as they do.
From Historical Introductions to the Symbolical Books of the Evangelical Lutheran Church by F. (Friedrich) Bente
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.
From The Journal of Abnormal Psychology, Volume 10 by Various
Critics called the product’s most notable side effect “delirium” and warned that these deliriums could have catastrophic effects on children, the elderly, or the immunocompromised.
From Slate ● Aug. 28, 2021
Is this the book that launched a thousand quips, and stirred the orators to deliriums of denunciation?
From Time Magazine Archive
On the evening of the second day, the girl—the one who Goddard said was so important—came into his room in between deliriums.
From "Scythe" by Neal Shusterman
Phrensies, deliriums, vigilation, idiotism, apoplexies, and other disorders of the brain, are all produced by the nerves being thus disarranged and debilitated.
From A Treatise on Foreign Teas Abstracted From An Ingenious Work, Lately Published, Entitled An Essay On the Nerves by Hugh Smith
Does he not send before him monitors and messengers: acute pains, which wholly absorb the soul; deliriums, which render reason of no avail; deadly stupors, which benumb the brightest and most piercing geniuses?
From The world's great sermons, Volume 03 Massillon to Mason by Grenville Kleiser
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
