death-dealing adjective 1noun 1 adjective1 •Causing or inflicting death, or capable of doing so; lethal.The country was at that time ruled by a death-dealing tyrant.The aliens were armed with an array of death-dealing weapons. noun1 •The causing of death; murder or killing.Sad lays were sung about the beset king, the vicious raids and ravages of Grendel, [...] how he would never parley or make peace with any Dane nor stop his death-dealing nor pay the death-price. — 1999