extinct

1 of 2

adjective

ex·​tinct ik-ˈstiŋ(k)t  ˈek-ˌstiŋ(k)t 

1

a

: no longer burning

b

: no longer active

an extinct volcano

2

: no longer existing

an extinct animal

3

a

: gone out of use : superseded

b

: having no qualified claimant

an extinct title

extinct

2 of 2

verb

extincted; extincting; extincts

transitive verb

archaic

: extinguish

Synonyms

Adjective

• bygone
• bypast
• dead
• defunct
• departed
• done
• expired
• gone
• nonextant
• vanished

Examples of extinct in a Sentence

Adjective

Many of these old traditions have since become extinct.

a few overgrown ruins are all that remain of that once mighty but now extinct civilization

Recent Examples on the Web

Adjective

Other lineages of ancient humans also went extinct around 40,000 years ago and disappeared just like the Neanderthals ultimately did, said Johannes Krause, director at the department of archaeogenetics at the Max Planck Institute for Evolutionary Anthropology. —Katie Hunt, CNN, 13 Dec. 2024

Once widespread across the globe, most lineages of early marsupials have long since gone extinct. —Scott Travers, Forbes, 13 Dec. 2024

Why did Neanderthals go extinct, and why did modern humans survive? —Evan Bush, NBC News, 12 Dec. 2024

This organization gives us the bandwidth to do our homework, and that’s a privilege that’s going extinct in journalism. —Bill Addison, Los Angeles Times, 7 Dec. 2024

Word History

Etymology

Adjective

Middle English, from Latin exstinctus, past participle of exstinguere

First Known Use

Adjective

15th century, in the meaning defined at sense 1a

Verb

15th century, in the meaning defined above

Kids Definition

extinct

adjective

ex·​tinct

ik-ˈstiŋ(k)t,

ˈek-ˌ

1

: no longer active

an extinct volcano

2

: no longer existing

an extinct species of animal

Medical Definition

extinct

adjective

ex·​tinct ik-ˈstiŋ(k)t  ˈek-ˌ 

: no longer existing : lacking living representatives

extinct prehistoric animals