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)

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

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

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.

DEADLY definition: likely to cause death | Meaning, pronunciation, translations and examples in American English

deadly, adj. & n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

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.

deadly meaning, definition, what is deadly: likely to cause death: Learn more.

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.