lethal applies to something that is bound to cause death or exists for the destruction of life.

LETHAL definition: of, relating to, or causing death; deadly; fatal: a lethal dose. See examples of lethal used in a sentence.

Add to word list able to cause or causing death; extremely dangerous: a lethal weapon (Definition of lethal from the Cambridge Academic Content Dictionary © Cambridge University Press)

1. Causing or capable of causing death: a lethal weapon. See Synonyms at fatal. 2. Extremely harmful; devastating: accusations lethal to the candidate's image.

A substance that is lethal can kill people or animals. ...a lethal dose of sleeping pills. ...chemicals lethal to fish and aquatic mammals.

Definition of lethal adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

fatal: a lethal weapon; a lethal injection. fatal: a lethal weapon; a lethal dose. made to cause death: a lethal chamber; a lethal attack. causing great harm or destruction: The disclosures were lethal to his …

Jan 20, 2026 · Adjective lethal (comparative more lethal, superlative most lethal) Of, pertaining to, or causing death; deadly; mortal; fatal.

Lethal definition: Causing or capable of causing death.

Lethal refers to anything that is capable of causing death or fatal harm. This term can be used to describe substances, weapons, diseases, or conditions, among other things, denoting their potential …