Pronunciation: (mu-lig'nunt), [key]
1. disposed to cause harm, suffering, or distress deliberately; feeling or showing ill will or hatred.
2. very dangerous or harmful in influence or effect.
a. tending to produce death, as bubonic plague.
b. (of a tumor) characterized by uncontrolled growth; cancerous, invasive, or metastatic.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.