Definition of: mortal

(môr′təl) adjective
1. Subject to death; hence, pertaining to humanity; human.
2. Causing, or that may or will cause, death; fatal.
3. Theol. Incurring the penalty of eternal death, as a sin: opposed to venial.
4. Marking the end of life.
5. Subject to fatal injury, as a vital organ.
6. Colloq. Extreme: a mortal fright; also, long and tedious.
7. Deadly in malice or purpose; inveterate: a mortal foe.
—noun Whatever is mortal or subject to death; a human being.
—adverb Colloq. Very; exceedingly: mortal tired. [<OF <L mortalis <mors, mortis death]