mortal

1 of 3

adjective

mor·​tal ˈmȯr-tᵊl 

1

: causing or having caused death : fatal

a mortal injury

2

a

: subject to death

mortal man

Every living creature is mortal.

b

: possible, conceivable

have done every mortal thing

c

: deadly sense 3

waited three mortal hours

3

: marked by unrelenting hostility

a mortal enemy

4

: marked by great intensity or severity

mortal fear

5

: human

mortal limits

a nobody with an all too mortal longing to be a somebody

—Time

6

: of, relating to, or connected with death

mortal agony

mortal

2 of 3

adverb

chiefly dialectal

: mortally

mortal

3 of 3

noun

: a human being

Synonyms

Adjective

• lethal
• deadly
• fatal

Noun

• person
• life
• man
• creature
• guy
• human

Choose the Right Synonym for mortal

deadly, mortal, fatal, lethal mean causing or capable of causing death.

deadly applies to an established or very likely cause of death.

a deadly disease

mortal implies that death has occurred or is inevitable.

a mortal wound

fatal stresses the inevitability of what has in fact resulted in death or destruction.

fatal consequences

lethal applies to something that is bound to cause death or exists for the destruction of life.

lethal gas

Examples of mortal in a Sentence

Adjective

Every living creature is mortal.

He suffered a mortal wound in the battle.

Noun

stories about gods interfering in the lives of mortals

the troubles that come to ordinary mortals

Recent Examples on the Web

Adjective

One day, every century, Death takes on a mortal form and walks among humans, better to understand them. —Christopher Rudolph, People.com, 24 July 2025

The occupants inside all three vehicles suffered mortal injuries and died at the scene, Hebler said. —Caleb Lunetta, San Diego Union-Tribune, 23 July 2025

Noun

The sitcom, celebrating the seriously spooky family living among mere mortals, starred John Astin as Gomez Addams, Carolyn Jones as Morticia Addams, Jackie Coogan as Uncle Fester, Ted Cassidy as Lurch and Lisa Loring as Wednesday Addams. —Angela Andaloro, People.com, 2 July 2025

Her portrayal of Diana gives this Amazonian princess the proper regal bearing, but Gadot proves to have a wonderfully wry sense of humor as the character continues to be amazed at how weird male mortals are. —Tim Grierson, Vulture, 11 July 2025

Word History

Etymology

Adjective and Adverb

Middle English, from Anglo-French mortel, mortal, from Latin mortalis, from mort-, mors death — more at murder

Noun

see human entry 1

First Known Use

Adjective

14th century, in the meaning defined at sense 1

Adverb

15th century, in the meaning defined above

Noun

15th century, in the meaning defined above

Phrases Containing mortal

• mortal combat
• mortal enemy
• mortal foe/rival
• mortal mind
• mortal remains
• mortal sin

Rhymes for mortal

• quartile
• immortal

Kids Definition

mortal

1 of 2 adjective

mor·​tal ˈmȯrt-ᵊl 

1

: capable of causing death

a mortal wound

2

: certain to die

animals are mortal

3

: extremely unfriendly

a mortal enemy

4

: very great or severe

in mortal fear

5

: human entry 1 sense 1

mortal limitations

6

: of, relating to, or connected with death

mortal agony

mortally

-ᵊl-ē

adverb

mortal

2 of 2 noun

: a human being

Medical Definition

mortal

adjective

mor·​tal ˈmȯrt-ᵊl 

1

: having caused or being about to cause death : fatal

a mortal injury

2

: of, relating to, or connected with death

mortal agony