delirium
Americannoun
plural
deliriums, deliria-
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.
-
a state of violent excitement or emotion.
noun
-
a state of excitement and mental confusion, often accompanied by hallucinations, caused by high fever, poisoning, brain injury, etc
-
violent excitement or emotion; frenzy
Other Word Forms
- deliriant adjective
- semidelirium noun
Etymology
Origin of delirium
1590–1600; < Latin dēlīrium frenzy, equivalent to dēlīr ( āre ) ( 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.
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
She channels all of Nina’s prior faux delirium into a ferocious finale that raises the stakes tenfold.
From Salon • Jan. 31, 2026
They spent the bowl season in a Las Vegas hotel, walking the Strip with a three-week old, in a new-parent-induced delirium, their whole lives having suddenly turned upside down.
From Los Angeles Times • Dec. 30, 2025
Mary Ann Patten is 19—petite, pretty and pregnant—when her husband, the captain of Neptune’s Car, the clipper ship she’s on, is struck down by disease and delirium from the tuberculosis that will ultimately kill him.
From The Wall Street Journal • Dec. 8, 2025
That afternoon, while Úrsula was trying to rescue Rebeca from the slough of delirium, he went with Magnífico Visbal and Gerineldo Márquez to Catarino's store.
From "One Hundred Years of Solitude" by Gabriel Garcia Marquez
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.
