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Definitions

delirious

[dih-leer-ee-uhs] / dɪˈlɪər i əs /
ADJECTIVE
having disordered thoughts and delusions
Synonyms
STRONGEST
crazed delusional deranged unhinged
STRONG
bewildered confused disturbed frantic frenetic frenzied incoherent irrational rambling raving
WEAK
flipped flipped-out hallucinatory lightheaded off one's head out of one's head out of one's skull unreasonable unsettled wandering
Antonyms
STRONGEST
aware balanced cognizant grounded rational reasonable sound
WEAK
collected
ADJECTIVE
intensely happy and excited
Synonyms
STRONGEST
ecstatic intoxicated mad rapturous thrilled transported
STRONG
carried away delighted fevered
WEAK
beside oneself corybantic drunk enthused hysterical overwrought rabid wild
Antonyms
STRONGEST
calm collected controlled sorrowful unhappy
WEAK
balanced unexcited

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.

Another became delirious with hunger, thirst and the cold.

From The Wall Street Journal • Jan. 2, 2026

Ms Whitson said he was delirious for days afterwards, and had to be tested for dementia.

From BBC • Dec. 16, 2025

Her performances are a space to have delirious fun, to paraphrase writer Kate Wolf.

From Los Angeles Times • Dec. 15, 2025

Then, for some unknown reason at the time, Grant ran in the opposite direction, followed by his teammates and delirious Oak Park fans.

From Los Angeles Times • Dec. 14, 2025

Mr. Kapasi turned the wheel, almost delirious with relief.

From "Interpreter of Maladies" by Jhumpa Lahiri

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.