Dictionary.com
Thesaurus.com
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.

Another problem, he adds, is that many people in rural India still rely on faith healers or local medicinal practices and go to hospitals only when their symptoms worsen, which can be lethal.

From BBC

He is a ruthless, complete player, lethal from both sides of the baseline, able to scramble, extend points and hit drop shots when he needs to.

From The Wall Street Journal

Anthropic’s focus on safe applications of AI—and its objection to having its technology used in autonomous lethal operations—have continued to cause problems, they said.

From The Wall Street Journal

In McDonnell’s report, he found that his officers followed police policy in the use of lethal force and the drawing and exhibiting of a weapon.

From Los Angeles Times

There are just a few examples of when the damage caused by less lethal munitions, wielded by law enforcement around the country, was caught on camera.

From Salon