a. deadly; causing or capable of causing death
In a decision the court upheld the use of all three drugs in lethal injections.
Sentence in Classic:
Evil besides (which I must still believe to be the lethal side of man) had left on that body an imprint of deformity and decay.
Dr. Jekyll and Mr. Hyde By Robert Louis Stevenson Context
There was no lethal weapon at hand, but I seized a shovel which the workmen had been using to fill the cases, and lifting it high, struck, with the edge downward, at the hateful face.