›(of living things, especially people) unable to continue living for ever; having to die: For all men are mortal.→ CompareimmortaladjectiveDeath and dying›causing death: a mortal injury/illnessmen engaged in mortal combat(= fighting until one of them dies)figurativeNew computing technology dealt a mortal blow to the power of the old printing unions.→ ComparelethalKillingMurder and attempted murdermortal dread/fear/terror›extreme anxiety about or fear of someone or something: We live in mortal dread of further attacks.Fear and phobiasAnxiety and worry - general wordsmortal enemy, danger, threat, etc.›a very serious and dangerous enemy, danger, threat, etc.Dangers and threatsSerious and severeSevere