'Malignancy' definitions:

Definition of 'malignancy'

(from WordNet)
noun
(medicine) a malignant state; progressive and resistant to treatment and tending to cause death [syn: malignancy, malignance]
noun
Quality of being disposed to evil; intense ill will [syn: malignity, malignancy, malignance] [ant: benignancy, benignity, graciousness]

Definition of 'Malignancy'

From: GCIDE
  • Malignance \Ma*lig"nance\, Malignancy \Ma*lig"nan*cy\, n. [See Malignant.]
  • 1. The state or quality of being malignant; extreme malevolence; bitter enmity; malice; disposition toward evil; intense ill will; as, malignancy of heart. [1913 Webster]
  • 2. Unfavorableness; evil nature. [1913 Webster]
  • The malignancy of my fate might perhaps distemner yours. --Shak. [1913 Webster]
  • 3. (Med.) Virulence; tendency to a fatal issue; as, the malignancy of an ulcer or of a fever. [1913 Webster]
  • 4. Hence: (Med.) A cancerous tumor that is spreading beyond the point of origin.
  • Syn: malignant tumor, malignant neoplasm, metastatic tumor. [WordNet 1.5]
  • 5. The state of being a malignant. [1913 Webster]