MORTAL

[adjective] [not gradable] slightly literary - (of living things, esp. people) unable to continue living forever; having to dieGods live forever, but humans are mortal beings and must die.Compare immortal.(slightly literary) A mortal blow/injury is one that causes death.(figurative) New computing technology dealt a mortal blow to the power of the old printing unions. Compare lethal.(slightly literary) Mortal combat is a fight in which two enemies try to kill each other.(figurative) Management and the union seem to be locked in mortal combat.(slightly literary) A mortal enemy/danger/threat is a very serious and dangerous one.To sheep farmers in the area, the wolf is a mortal enemy.The police delay exposed her to mortal danger.He was in mortal (= very great) fear/terror of what might happen.In the Roman Catholic religion a mortal sin is an action that is so bad that you will be punished forever after your death, if you do not ask for forgiveness from God.