Causing or tending to cause death; Causing or tending to cause death; 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.
Summer deadliest time of year on roads CAAQuebec
See examples of deadly used in a sentence. Deadly, mortal, fatal, lethal mean causing or capable of causing death. Deadly applies to an established or very likely cause of death.
Aiming to kill or destroy;
