Meaning of malignant

ma•lig•nant

Pronunciation: (mu-lig'nunt), [key]
— adj.
  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.
    1. tending to produce death, as bubonic plague.
    2. (of a tumor) characterized by uncontrolled growth; cancerous, invasive, or metastatic.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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