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Definition of "mass murderer" []

  • A person, especially a political or military leader, who is responsible for the deaths of many individuals. (noun)
  • A person who kills several or numerous victims in a single incident. (noun)
  • A serial killer. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.