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Synonyms

lethal

American  
[lee-thuhl] / ˈli θəl /

adjective

  1. of, relating to, or causing death; deadly; fatal: a lethal dose.

    a lethal weapon;

    a lethal dose.

  2. made or carried out to cause death: a lethal attack.

    a lethal chamber;

    a lethal attack.

  3. causing great harm or destruction.

    The disclosures were lethal to his candidacy.


lethal British  
/ liːˈθælɪtɪ, ˈliːθəl /

adjective

  1. able to cause or causing death

  2. of or suggestive of 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

Related Words

See fatal.

Other Word Forms

  • hyperlethal adjective
  • lethality noun
  • lethally adverb
  • lethalness noun
  • nonlethal adjective
  • nonlethally adverb
  • semilethal adjective

Etymology

Origin of lethal

First recorded in 1575–85; from Latin lētālis, equivalent to lēt(um) “death” + -ālis -al 1; spelling (hence pronunciation) with -h- by association with Greek lḗthē “oblivion”; Lethe ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But the same properties that made the cells a scientific miracle also made them lethal.

From BBC

Separately, the LDP on Wednesday proposed changes to Japan's stringent rules on exporting military equipment so as to enable exports of lethal weapons, local reports said.

From Barron's

“A country entrusting lethal decisions to a system that doesn’t share its loyalties is taking a profound risk, even if that system is trying to be principled,” Claude added.

From Los Angeles Times

Individuals will be able to choose to have a doctor administer a lethal dose intravenously, as happens in Spain, Canada, New Zealand and most of Australia.

From BBC

In the US, 10 states and the Washington DC federal district allow "physician-assisted dying" where doctors can prescribe lethal drugs for self-administration.

From BBC