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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. The meaning of LETHAL is of, relating to, or causing death. How to use lethal in a sentence. Synonym Discussion of Lethal.

  4. 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.

  5. 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.

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

  8. Extremely harmful; devastating. Accusations lethal to the candidate's image. American Heritage. Synonyms: deadly. poison. toxic. dangerous. poisonous. mortal. harmful. fatal. vital. deathly. Antonyms: beneficial. helpful. life-giving. safe. harmless. noun.

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

  10. Definition of lethal – Learner’s Dictionary. lethal. adjective. uk / ˈliːθ ə l / us. able to cause death: a lethal injection / weapon. Want to learn more? Improve your vocabulary with English Vocabulary in Use from Cambridge. Learn the words you need to communicate with confidence.

  11. lethal meaning, definition, what is lethal: causing death, or able to cause death: Learn more.