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mass hysteria

American

noun

Psychology.

a condition affecting a group of persons, characterized by excitement or anxiety, irrational behavior or beliefs, or inexplicable symptoms of illness.

Etymology

Origin of mass hysteria

First recorded in 1930–35

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.

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mass hysteria

“It is a virus for which humanity has no cure,” Noah tells his former colleague, implying the mass hysteria caused by the confirmation of aliens will only drive us closer to ruin.

From Salon ● Jun. 13, 2026

This is very bad, although hardly a Ghostbusters-style, apocalyptic vision that includes human sacrifice and mass hysteria.

From Barron's ● May 1, 2026

In some cases, they have attributed reported health-effects from fume exposure to factors including hyperventilation, jet lag, psychological stress, mass hysteria and malingering.

From The Wall Street Journal ● Sep. 14, 2025

A small group of nobodies on TikTok saying dumb shit is not a viral trend that necessitates mass hysteria in response.

From Slate ● Nov. 16, 2023

But the press and the Princeton study painted a picture of nationwide mass hysteria.

From "Spooked!" by Gail Jarrow

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023