|a chattering or flighty, light-headed person.|
|a fool or simpleton; ninny.|
|1.||having or showing desire to harm others|
|2.||tending to cause great harm; injurious|
|3.||pathol (of a tumour) uncontrollable or resistant to therapy; rapidly spreading|
|4.||history (in the English Civil War) a Parliamentarian term for a royalist|
|[C16: from Late Latin malīgnāre to behave spitefully, from Latin malīgnus|
malignant ma·lig·nant (mə-lĭg'nənt)
Threatening to life, as a disease; virulent.
Tending to metastasize; cancerous. Used of a tumor.
A descriptive term for things or conditions that threaten life or well-being. Malignant is the opposite of benign.
Note: The term malignant is used in describing cancerous tumors (see cancer) because such growths are a threat to the health of the individual.
Note: The term is often used in a general way to denote something that is both destructive and fast growing: “The malignant growth of the suburbs is destroying the landscape.”