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Definition of "malignant" []

  • Showing great malevolence; disposed to do evil. (adjective)
  • Highly injurious; pernicious. (adjective)
  • Pathology Threatening to life; virulent: a malignant disease. (adjective)
  • Pathology Tending to metastasize; cancerous. Used of a tumor. (adjective)

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.

Use "malignant" in a sentence
  • "_malignant_ and _poisonous_ affections, as scirrhus and other varieties of cancer, and also cases of infectious virus, demand continually, or with but occasional exceptions, the primary galvanic current A B. ☞ In treating these malignant affections, the current should be run through as short a distance of _healthy_ tissue as possible, yet so as fairly to reach the diseased part."
  • "‡ The term malignant is used in describing cancerous tumors (see cancer) because such growths are a threat to the health of the individual."
  • "Congressman Foley is the poster child for what we call malignant narcissism."