[ lee-thuh l ]
/ ˈli θəl /
of, relating to, or causing death; deadly; fatal: a lethal weapon; a lethal dose.
made or carried out to cause death: a lethal chamber; a lethal attack.
causing great harm or destruction: The disclosures were lethal to his candidacy.
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Origin of lethal
1575–85; < Latin lētālis, equivalent to lēt(um) death + -ālis -al1; spelling (hence pronunciation) with -h- by association with Greek lḗthē oblivion
OTHER WORDS FROM lethal
le·thal·i·ty, le·thal·ness, nounle·thal·ly, adverbhy·per·le·thal, adjectivenon·le·thal, adjective
non·le·thal·ly, adverbsem·i·le·thal, adjective
Words nearby lethal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for lethalness
/ (ˈliːθəl) /
able to cause or causing death
of or suggestive of death
Derived forms of lethallethality (liːˈθælɪtɪ), nounlethally, adverb
Word Origin for lethal
C16: from Latin lēthālis, from lētum death
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
Medical definitions for lethalness
[ lē′thəl ]
Capable of causing death.
Of, relating to, or causing death.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.