Definition of pestilence noun from the Oxford Advanced Learner's Dictionary

 

pestilence

 noun
noun
BrE BrE//ˈpestɪləns//
 
; NAmE NAmE//ˈpestɪləns//
 
[uncountable, singular](old use or literary)
 
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any infectious disease that spreads quickly and kills a lot of people Word Origin Middle English (also denoting something morally corrupting): from Old French, from Latin pestilentia, based on pestis ‘a plague’.
See the Oxford Advanced American Dictionary entry: pestilence