ma·lig·ni·ty \məˈlignəd.ē, -ətē, -i\noun (-es) Etymology: Middle English malignitee, from Middle French malignité, from Latin malignitat-, malignitas, from malignus malign + -itat-, -itas -ity — more at malign 1.: great malignancy or malice 2.: an instance of malignant or malicious behavior or nature Synonyms:see malice