adjective

1. having an evil influence; malign
2. wishing evil; very malevolent or malicious
3. very harmful
4. very dangerous or virulent; causing or likely to cause death; not benign; specif., cancerous
5. Obsolete malcontent; rebellious; disaffected

Etymology: LL malignans (gen. malignantis), prp. of malignare: see malign

noun