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lethal

[lee-thuh l] /ˈli θəl/
adjective
1.
of, pertaining to, or causing death; deadly; fatal:
a lethal weapon; a lethal dose.
2.
made to cause death:
a lethal chamber; a lethal attack.
3.
causing great harm or destruction:
The disclosures were lethal to his candidacy.
Origin
1575-1585
1575-85; < Latin lētālis, equivalent to lēt(um) death + -ālis -al1; spelling (hence pronunciation) with -h- by association with Greek lḗthē oblivion
Related forms
lethality, lethalness, noun
lethally, adverb
hyperlethal, adjective
nonlethal, adjective
nonlethally, adverb
semilethal, adjective
unlethal, adjective
unlethally, adverb
Synonyms
1. See fatal.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for lethality
  • Critics also complain about the weapons' relative lethality.
  • It was undeniably if darkly appealing in its lethality.
British Dictionary definitions for lethality

lethal

/ˈliːθəl/
adjective
1.
able to cause or causing death
2.
of or suggestive of death
Derived Forms
lethality (liːˈθælɪtɪ) noun
lethally, adverb
Word Origin
C16: from Latin lēthālis, from lētum death
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for lethality
lethal
1580s, from L.L. lethalis, from L. letalis "deadly, fatal," from letum "death," of uncertain origin. Form altered in L.L. by association with lethe hydor "water of oblivion" in Hades in Greek mythology, from Gk. lethe "forgetfulness."
Online Etymology Dictionary, © 2010 Douglas Harper
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lethality in Medicine

lethal le·thal (lē'thəl)
adj.

  1. Capable of causing death.

  2. 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.
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