mass hysteria

mass hysteria definition - medical

mass hysteria

noun
  1. Spontaneous, en masse development of identical physical or emotional symptoms among a group of individuals, as in a classroom of schoolchildren.
  2. A socially contagious frenzy of irrational behavior in a group of people as a reaction to an event.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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