noun

1. A human; someone susceptible to death.

   “Her wisdom was beyond that of a mere mortal.”

adjective

1. Susceptible to death by aging, sickness, injury, or wound; not immortal.

2. Causing death; deadly, fatal, killing, lethal (now only of wounds, injuries etc.).

3. Punishable by death.

Synonyms: baneful, fatal, lethal

adverb

1. Mortally; enough to cause death.

   “It's mortal cold out there.”