• IPA: /məˈlɪɡnənt/


  1. Harmful, malevolent, injurious.
    malignant temper;  malignant revenge;  malignant infection
  2. (medicine) Tending to produce death; threatening a fatal issue.
    malignant diphtheria
    a malignant tumor
  • (medicine) benign, non-malignant
Related terms Translations Translations Noun

malignant (plural malignants)

  1. A deviant; a person who is hostile or destructive to society.
    • 1823, The Retrospective Review (volume 7, page 11)
      As devout Stephen was carried to his burial by devout men, so is it just and equal that malignants should carry malignants […]
  2. (historical, derogatory, obsolete) A person who fought for Charles I in the English Civil War.

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