Definition of malignant adjective from the Oxford Advanced American Dictionary

     

    malignant

     adjective
    adjective
    NAmE//məˈlɪɡnənt//
     
     
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  1. 1(of a tumor or disease) that cannot be controlled and is likely to cause death malignant cells compare benign opposite nonmalignant
  2. 2(formal) having or showing a strong desire to harm someone synonym malevolent
See the Oxford Advanced Learner's Dictionary entry: malignant