[muh-lig-nuh n-see]

noun, plural ma·lig·nan·cies for 2, 3.

the quality or condition of being malignant.
malignant character, behavior, action, or the like: the malignancies of war.
a malignant tumor.

Also ma·lig·nance (for defs 1, 2).

Origin of malignancy

First recorded in 1595–1605; malign(ant) + -ancy
Related formsnon·ma·lig·nance, nounnon·ma·lig·nan·cy, noun, plural non·ma·lig·nan·cies. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for malignancy

malevolence, malignity, hatred, malice

Examples from the Web for malignancy

Contemporary Examples of malignancy

Historical Examples of malignancy

British Dictionary definitions for malignancy


noun plural -cies

the state or quality of being malignant
pathol a cancerous growth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for malignancy

c.1600, "malignant nature," from malignant + -cy. Of growths, tumors, from 1680s.

Online Etymology Dictionary, © 2010 Douglas Harper

malignancy in Medicine




The state or quality of being malignant.
A malignant tumor.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.