1 human; transitory, temporal, transient, ephemeral:
It finally dawned on him that the king was mortal, like other men.
2 physical, bodily, corporeal, corporal, fleshly, earthly, worldly, perishable:
Her mortal remains are buried at Bognor Regis.
3 deadly, fatal, lethal, terminal, destructive, disastrous:
The admiral lay dying from a mortal wound.
4 relentless, implacable, unrelenting, bitter, sworn, deadly, unremitting, unappeasable, unceasing:
Halifax was the mortal enemy of despotism.
5 abject, extreme, awful, great, enormous, intense, terrible, inordinate, dire:
Giles lived in mortal fear of offending his mother.
6 human (being), man, woman, person, soul, individual, creature, earthling:
The novel depicts a lifestyle far removed from that of ordinary mortals. We mortals have nothing to fear from intergalactic aliens.