Noah Webster's Dictionary 1. (n.) The state or quality of being malignant; extreme malevolence; bitter enmity; malice; as, malignancy of heart. 2. (n.) Unfavorableness; evil nature. 3. (n.) Virulence; tendency to a fatal issue; as, the malignancy of an ulcer or of a fever. 4. (n.) The state of being a malignant.

Multi-Version Concordance Malignancy (2 Occurrences) Leviticus 13:51 And he shall look on the plague on the seventh day: if the plague be spread in the garment, or in the warp, or in the woof, or in the skin, whatever service skin is used for, the plague is a malignant leprosy: it is unclean. (See NAS) Leviticus 13:52 And he shall burn the garment, or the warp, or the woof, whether it be of wool or of linen, or any thing of skin, wherein the plague is; for it is a malignant leprosy; it shall be burnt in the fire. (See NAS)