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- Dictionarydeadly/ˈdɛdli/
adjective
- 1. causing or able to cause death: "a deadly weapon" Similar Opposite
- 2. very good; excellent: informal Irish, Australian "it's a great town and the pubs are deadly"
adverb
- 1. in a way resembling or suggesting death; as if dead: "her skin was deadly pale" Similar
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DEADLY definition: 1. likely to cause death: 2. complete or extreme: 3. extremely boring: . Learn more.
1. : likely to cause or capable of producing death. deadly poison. 2. a. : aiming to kill or destroy : implacable. a deadly enemy. b. : highly effective. a deadly exposé. c. : unerring. a deadly marksman. d. : marked by determination or extreme seriousness. 3. a. : tending to deprive of force or vitality.
Deadly definition: causing or tending to cause death; fatal; lethal. See examples of DEADLY used in a sentence.
If something is deadly, it is likely or able to cause someone's death, or has already caused someone's death. He was acquitted on charges of assault with a deadly weapon. ...a deadly disease currently affecting dolphins. Passive smoking can be deadly too.
Define deadly. deadly synonyms, deadly pronunciation, deadly translation, English dictionary definition of deadly. adj. dead·li·er , dead·li·est 1. Causing or tending to cause death: deadly weapons; a deadly spill of radioactive waste products. See Synonyms at fatal.
Something that's deadly can kill you. Because a gun can end someone's life, it's a deadly weapon. If someone's diagnosed with a deadly disease, it's lethal — it's capable of ending the person's life.
Definition of deadly adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.