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Definitions

paranoia

[par-uh-noi-uh] / ˌpær əˈnɔɪ ə /
NOUN
mental illness
Synonyms
STRONGEST
insanity mental disorder
WEAK
crack-up craziness delusions depression derangement disturbed mind emotional disorder emotional instability loss of mind lunacy madness maladjustment mania mental disease mental sickness nervous breakdown nervous disorder neurosis neurotic disorder phobia psychopathy psychosis sick mind troubled mind unbalanced mind unsoundness of mind

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.

My working theory is that they tap into audiences with a preexisting suspicion that the world is wicked — they prove paranoia to be well-founded.

From Los Angeles Times • Mar. 11, 2026

Unable to sleep after a traumatic birth in 2024, Lizzy quickly deteriorated into a state of psychosis - a potentially life-threatening condition that can cause hallucinations, severe insomnia and paranoia.

From BBC • Mar. 8, 2026

"There's paranoia around AI in every industry," said Wedbush analyst Dan Ives.

From Barron's • Feb. 22, 2026

On the most fundamental level, the demand for privacy is not about paranoia or fear.

From Salon • Feb. 20, 2026

Among the most progressive alienists, this kind of unfounded belief was known as a delusion, associated with a newly identified disorder called paranoia.

From "The Devil in the White City" by Erik Larson