malignant

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malignant /məˈlɪgnənt/ adjective
malignant
/məˈlɪgnənt/
adjective
Learner's definition of MALIGNANT
[more malignant; most malignant]
medical : very serious and dangerous : tending or likely to grow and spread in a rapid and uncontrolled way that can cause death
opposite benign
formal : very evil

— malignantly

adverb
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