Definition of malignant
1a obsolete : malcontent, disaffectedb : evil in nature, influence, or effect : injurious a powerful and malignant influencec : passionately and relentlessly malevolent : aggressively malicious the malignant tongues of gossipers
Examples of malignant in a Sentence
a highly malignant form of cancer
a powerful and malignant influence
Recent Examples of malignant from the Web
In A.F. Harrold’s gripping novel set in England, the girl, who goes by Frank, cannot seem to turn around without being persecuted by an older boy and his malignant cronies.
If a cluster of malignant cells is waging a war on your body, everything else is moot, right?
Researchers now have a more complete picture of how fused, garbled, or incomplete genes can cause malignant cells to grow at multiple sites in the body.
In this age of ignorance and malignant spin, the truth has a striped rump to disguise its profile, and long ears to sense predators.
Sharpless, 50, has done extensive work on how cells age and become malignant.
If malignant cells are found, the standard treatment is to surgically remove all the lymph nodes in the same area.
The stressed malignant cells activate a mechanism called the unfolded protein response.
Meanwhile, Pettey warns that cancers of the eye itself, including squamous cell carcinomas and malignant melanomas, also can result from sun exposure.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'malignant'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of malignant
Late Latin malignant-, malignans, present participle of malignari
First Known Use: 1542See Words from the same year
MALIGNANT Defined for English Language Learners
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
Medical Definition of malignant
1: tending to produce death or deterioration malignant malaria; especially : tending to infiltrate, metastasize, and terminate fatally malignant tumors—compare benign 1
2: of unfavorable prognosis : not responding favorably to treatment psychotic reactions with a malignant trend
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