DEADLY Definition Meaning - Merriam-Webster deadly, mortal, fatal, lethal mean causing or capable of causing death deadly applies to an established or very likely cause of death
Deadly - definition of deadly by The Free Dictionary 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