Definition of malignant
- a powerful and malignant influence
- the malignant tongues of gossipers
a highly malignant form of cancer
a powerful and malignant influence
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.
First Known Use: 1542See Words from the same year
medical : very serious and dangerous : tending or likely to grow and spread in a rapid and uncontrolled way that can cause death
: very evil
What made you want to look up malignant? Please tell us where you read or heard it (including the quote, if possible).
of yeast or being unsettled or frivolous
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