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Definition of pestilential
1a : causing or tending to cause pestilence : deadlyb : of or relating to pestilence
2 : morally harmful : pernicious
3 : giving rise to vexation or annoyance : irritating
From the M-W Editors
Recent Examples of pestilential from the Web
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But unlike other animals tagged as invasive and pestilential — like Burmese pythons, feral hogs, and snakehead fish — mute swans are widely beloved.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pestilential'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of pestilential
14th century
Medical Dictionary
pestilential
play
adjective
pes·ti·len·tial
\ˌpes-tə-ˈlen-chəl\
Medical Definition of pestilential
1: causing or tending to cause pestilence
2: of or relating to pestilence
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