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  1. Dictionary
    lethal
    /ˈliːθl/

    adjective

    • 1. sufficient to cause death: "a lethal cocktail of drink and pills"

    More definitions, origin and scrabble points

  2. able to cause or causing death; extremely dangerous: Three minutes after the fire started, the house was full of lethal fumes. In the car the police found guns, knives, and other lethal weapons (= weapons that can kill). A 59-year-old man was executed by lethal injection (= by having a poisonous substance put into his body) this morning.

  3. 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. lethality. lē-ˈtha-lə-tē. noun.

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

  5. 1. of or causing death; deadly; fatal: a lethal weapon; a lethal dose. 2. made to cause death: a lethal injection. 3. causing great harm; disastrous: The disclosures were lethal to his candidacy. [1575–85; < Latin lētālis, lēthalis, derivative of lētum death] syn: See fatal.

  6. Lethal refers to anything dangerous enough to cause death. The cobra's venom is so lethal that if you get bitten and can't find the antidote, it's lights out forever. Poisonous spiders, guns, knives, and radiation — all of these things can be lethal because they have the ability to kill.

  7. 1. adjective. A substance that is lethal can kill people or animals. ...a lethal dose of sleeping pills. ...chemicals lethal to fish and aquatic mammals. Synonyms: deadly, terminal, fatal, deathly More Synonyms of lethal. 2. adjective. If you describe something as lethal, you mean that it is capable of causing a lot of damage.

  8. causing or able to cause death synonym deadly, fatal. She had been given a lethal dose of poison. Any sharp pointed instrument is potentially a lethal weapon. (figurative) The closure of the factory dealt a lethal blow to the town. The snake’s venom is rarely lethal to humans.

  9. LETHAL definition: able to cause death: . Learn more.

  10. lethal. adjective. /ˈliθl/ causing or able to cause death synonym deadly synonym fatal a lethal dose of poison a lethal weapon (figurative) The closure of the factory dealt a lethal blow to the town. The snake's venom is rarely lethal to humans. Take your English to the next level.

  11. Lethal Definition. lēthəl. Meanings. Synonyms. Sentences. Definition Source. Origin. Adjective. Noun. Filter. adjective. Causing or capable of causing death; fatal or deadly. Webster's New World. Similar definitions. Extremely harmful; devastating. Accusations lethal to the candidate's image. American Heritage. Synonyms: deadly. poison. toxic.