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.

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

deadly, mortal, fatal, lethal mean causing or capable of causing death. deadly applies to an established or very likely cause of death.

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    deadly definition: causing or able to cause death. Check meanings, examples, usage tips, pronunciation, domains, and related words. Discover expressions like "deadly earnest", "deadly dull", "deadly serious".

    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.

  • 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.
  • Synonyms: deathly, fatal, lethal, mortal, killer, more. Collocations: a deadly [virus, illness], a deadly attack on [Paris], the deadly attack on [Monday], more.

    DEADLY definition: causing or tending to cause death; fatal; lethal. See examples of deadly used in a sentence.

  • 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.
  • Synonyms: deathly, fatal, lethal, mortal, killer, more. Collocations: a deadly [virus, illness], a deadly attack on [Paris], the deadly attack on [Monday], more.

    DEADLY definition: causing or tending to cause death; fatal; lethal. See examples of deadly used in a sentence.

    5 days ago · deadly (comparative deadlier or more deadly, superlative deadliest or most deadly) (obsolete, rare) Subject to death; mortal.

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