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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.

She’s lethal and dangerous, so it’s a fine edge that you have to walk.

From Los Angeles Times

Authorisation to carry the "non‑lethal" weapon is granted "on an experimental basis" for a period of three years from the date the decree enters into force, the journal entry said.

From Barron's

Anthropic, meanwhile, doesn’t want its technology used for operations including domestic surveillance and autonomous lethal activities.

From The Wall Street Journal

They were utterly lethal in the opening minutes, Russell sending them on their way with an early penalty that was borne out of hard and direct rugby that England could not live with.

From BBC

If “One of Us” is an entertaining family saga of privilege and comeuppance, it is also a consummate novel of suspense in which revelations detonate with lethal accuracy.

From The Wall Street Journal