Dictionary.com
Thesaurus.com
Synonyms

mortal

American  
[mawr-tl] / ˈmɔr tl /

adjective

  1. subject to death; having a transitory life.

    all mortal creatures.

  2. of or relating to human beings as subject to death; human.

    this mortal life.

  3. belonging to this world.

  4. deadly or implacable; relentless.

    a mortal enemy.

  5. severe, dire, grievous, or bitter.

    in mortal fear.

  6. causing or liable to cause death; fatal.

    a mortal wound.

  7. to the death.

    mortal combat.

  8. of or relating to death.

    the mortal hour.

  9. involving spiritual death (venial ).

    mortal sin.

  10. long and wearisome.

  11. extreme; very great.

    in a mortal hurry.

  12. conceivable; possible.

    of no mortal value to the owners.


noun

  1. a human being.

  2. the condition of being subject to death.

mortal British  
/ ˈmɔːtəl /

adjective

  1. (of living beings, esp human beings) subject to death

  2. of or involving life or the world

  3. ending in or causing death; fatal

    a mortal blow

  4. deadly or unrelenting

    a mortal enemy

  5. of or like the fear of death; dire

    mortal terror

  6. great or very intense

    mortal pain

  7. possible

    there was no mortal reason to go

  8. slang long and tedious

    for three mortal hours

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. a mortal being

  2. informal a person

    a mean mortal

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Related Words

See fatal.

Other Word Forms

  • mortally adverb
  • nonmortal adjective
  • nonmortally adverb
  • postmortal adjective
  • postmortally adverb
  • premortal adjective
  • premortally adverb
  • unmortal adjective

Etymology

Origin of mortal

First recorded in 1325–75; Middle English, Middle French mortal, mortel, from Latin mortālis, equivalent to mort- (stem of mors ) “death” + -ālis -al 1; ambrosia ( def. ); murder ( def. ); murther ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

That would be considered a mortal sin by the vast majority of football fandom.

From BBC • Mar. 29, 2026

But over the past few days, something strange has happened: The Canadians have looked shockingly mortal.

From The Wall Street Journal • Feb. 21, 2026

The 56 signers of the Declaration of Independence knew their expression of character placed them at mortal risk.

From Los Angeles Times • Feb. 19, 2026

Many observers have professed confusion over how Good, an unarmed person, can somehow be seen as a mortal threat.

From Salon • Jan. 15, 2026

“You have chosen well, though the path will not be easy. Many monsters will rise against you. Even some of my own servants have sided with Gaea, hoping to destroy your mortal world.”

From "The House of Hades" by Rick Riordan