malignant

play
adjective ma·lig·nant \mə-ˈlig-nənt\

Definition of malignant

  1. 1 a obsolete :  malcontent, disaffected b :  evil in nature, influence, or effect :  injurious c :  passionately and relentlessly malevolent :  aggressively malicious

  2. 2 :  tending to produce death or deterioration <malignant malaria>; especially :  tending to infiltrate, metastasize, and terminate fatally <a malignant tumor>

malignantly

adverb

Examples of malignant in a sentence

  1. a highly malignant form of cancer

  2. a powerful and malignant influence

Origin and Etymology of malignant

Late Latin malignant-, malignans, present participle of malignari


First Known Use: circa 1545


MALIGNANT Defined for English Language Learners

malignant

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adjective ma·lig·nant \mə-ˈlig-nənt\

Definition of malignant for English Language Learners

  • medical : very serious and dangerous : tending or likely to grow and spread in a rapid and uncontrolled way that can cause death

  • : very evil


MALIGNANT Defined for Kids

malignant

play
adjective ma·lig·nant \mə-ˈlig-nənt\

Definition of malignant for Students

  1. 1 :  malicious

  2. 2 :  likely to cause death :  deadly

malignantly

adverb

Medical Dictionary

malignant

play
adjective ma·lig·nant \mə-ˈlig-nənt\

Medical Definition of malignant

  1. 1:  tending to produce death or deterioration <malignant malaria>; especially :  tending to infiltrate, metastasize, and terminate fatally <malignant tumors>—compare benign 1

  2. 2:  of unfavorable prognosis :  not responding favorably to treatment <psychotic reactions with a malignant trend>



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