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)

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

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.

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 · lethal (comparative more lethal, superlative most lethal) Whether modern, industrial man is less or more warlike than his hunter-gatherer ancestors is impossible to determine. The machine …

Lethal definition: Causing or capable of causing death.

The word 'lethal' originated from the Latin word 'letalis' meaning 'deadly' or 'fatal'. It has been used in English since the 15th century to describe something capable of causing death.