Dictionary

1lethal

adjective le·thal \ˈlē-thəl\

: causing or able to cause death

Full Definition of LETHAL

1
a :  of, relating to, or causing death <death by lethal injection>
b :  capable of causing death <lethal chemicals>
2
:  gravely damaging or destructive :  devastating <a lethal attack on his reputation>
3
:  very potent or effective <a lethal fastball>; also :  having a high alcohol content <a lethal rum punch>
le·thal·i·ty \lē-ˈtha-lə-tē\ noun
le·thal·ly \ˈlē-thə-lē\ adverb

Examples of LETHAL

  1. a potentially lethal dose of a drug
  2. He was sentenced to death by lethal injection.

Origin of LETHAL

Latin letalis, lethalis, from letum death
First Known Use: circa 1604

Synonym Discussion of LETHAL

deadly, mortal, fatal, lethal mean causing or capable of causing death. deadly applies to an established or very likely cause of death <a deadly disease>. mortal implies that death has occurred or is inevitable <a mortal wound>. fatal stresses the inevitability of what has in fact resulted in death or destruction <fatal consequences>. lethal applies to something that is bound to cause death or exists for the destruction of life <lethal gas>.

2lethal

noun

Definition of LETHAL

1
:  an abnormality of genetic origin causing the death of the organism possessing it

First Known Use of LETHAL

1917

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