deadly, mortal, fatal, lethal mean causing or capable of causing death. deadly applies to an established or very likely cause of death. Add to word list dangerous and able to kill: a deadly poison (Definition of deadly from the Cambridge Academic Content Dictionary © Cambridge University Press) 1. causing or tending to cause death; lethal. 2. aiming to kill or destroy; implacable: a deadly enemy. 3. like death. 4. excruciatingly boring. 5. excessive; inordinate: deadly haste.

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If you describe a person or their behaviour as deadly, you mean that they will do or say anything to get what they want, without caring about other people. Synonyms: deathly, fatal, lethal, mortal, killer, more. Collocations: a deadly [virus, illness], a deadly attack on [Paris], the deadly attack on [Monday], more. Definition of deadly adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. deadly definition: causing or able to cause death. Check meanings, examples, usage tips, pronunciation, domains, and related words. Discover expressions like "this book is deadly", "deadly earnest",. deadly, adj. & n. meanings, etymology, pronunciation and more in the Oxford English Dictionary Deadly refers to something that is likely to cause or is capable of causing death; lethal, fatal, or life-threatening. It can also refer to something highly dangerous, ominous or with adverse effects.

deadly, adj. & n. meanings, etymology, pronunciation and more in the Oxford English Dictionary Deadly refers to something that is likely to cause or is capable of causing death; lethal, fatal, or life-threatening. It can also refer to something highly dangerous, ominous or with adverse effects.

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