Noun

(malignancies)

The state of being malignant or diseased.

A malignant cancer; specifically, any neoplasm that is invasive or otherwise not benign.

That which is malign; evil, depravity, malevolence.

* Shakespeare

The malignancy of my fate might perhaps distemper yours.

* {{quote-book, year=1902, author=Arthur Conan Doyle, title=The Hound of the Baskervilles citation

, passage=A cold wind swept down from it and set us shivering. Somewhere there, on that desolate plain, was lurking this fiendish man, hiding in a burrow like a wild beast, his heart full of malignancy against the whole race which had cast him out.}}

Noun

(en noun)

Any epidemic disease that is highly contagious, infectious, virulent and devastating.

* 1949 - Bruce Kiskaddon, George R. Stewart,

The snowshoe-rabbits build up through the years until they reach a climax when they seem to be everywhere; then with dramatic suddenness their pestilence falls upon them.