[pes-tl-en-shuh l]


producing or tending to produce pestilence.
pertaining to or of the nature of pestilence, especially bubonic plague.
pernicious; harmful.
annoyingly troublesome.

Origin of pestilential

First recorded in 1350–1400; Middle English word from Medieval Latin word pestilentiālis. See pestilent, -ial
Related formspes·ti·len·tial·ly, adverbpes·ti·len·tial·ness, nounan·ti·pes·ti·len·tial, adjectivenon·pes·ti·len·tial, adjectiveun·pes·ti·len·tial, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Historical Examples of pestilential

British Dictionary definitions for pestilential



dangerous or troublesome; harmful or annoying
of, causing, or resembling pestilence
Derived Formspestilentially, adverb
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 pestilential

late 14c., from Medieval Latin pestilentialis, from Latin pestilentia "plague" (see pestilence). Related: Pestilentially.

Online Etymology Dictionary, © 2010 Douglas Harper

pestilential in Medicine




Of, relating to, or tending to produce a pestilence.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.