noun a man of extrems enmity or evil intentions.
2. malignant ·adj characterized or caused by evil intentions; pernicious.
3. malignant ·noun one of the adherents of charles l. or charles ll.;
so called by the opposite party.
4. malignant ·adj tending to produce death; threatening a fatal issue; virulent; as, malignant diphtheria.
5. malignant ·adj disposed to do harm, inflict suffering, or cause distress; actuated by extreme malevolence or enmity; virulently inimical; bent on evil; malicious.