ex·tinct
ik-ˈstiŋ(k)t 
ˈek-ˌstiŋ(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: no longer active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: gone out of use : superseded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
Synonyms
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
Margherita Bassi, Smithsonian Magazine, 29 Oct. 2024
The deep-water species belongs to a group of animals known as arthropods—an incredibly diverse group of invertebrates with jointed limbs and a hard shell known as an exoskeleton, which includes arachnids, insects and crustaceans, as well as extinct animals like trilobites.
—Nina Turner, Newsweek, 29 Oct. 2024
By 2340, an army of drones has taken over the planet and humans are nearly extinct.
—Elsa Keslassy, Variety, 28 Oct. 2024
And some of those flowers may soon become extinct because of climate change.
—Sandra Dallas, The Denver Post, 27 Oct. 2024
See all Example Sentences for extinct 
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Adjective
Then, the team matches the extinct animal with a close living relative and uses video and computer vision techniques to translate the modern animal’s movements into mathematical representations.
—Margherita Bassi, Smithsonian Magazine, 29 Oct. 2024
The deep-water species belongs to a group of animals known as arthropods—an incredibly diverse group of invertebrates with jointed limbs and a hard shell known as an exoskeleton, which includes arachnids, insects and crustaceans, as well as extinct animals like trilobites.
—Nina Turner, Newsweek, 29 Oct. 2024
By 2340, an army of drones has taken over the planet and humans are nearly extinct.
—Elsa Keslassy, Variety, 28 Oct. 2024
And some of those flowers may soon become extinct because of climate change.
—Sandra Dallas, The Denver Post, 27 Oct. 2024
See all Example Sentences for extinct
Articles Related to extinct
Dictionary Entries Near extinct
Cite this Entry
“Extinct.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/extinct. Accessed 16 Nov. 2024.
Copy CitationMedical Definition
extinct
adjective
ex·tinct
ik-ˈstiŋ(k)t
ˈek-ˌ
ˈek-ˌ
: no longer existing : lacking living representatives
extinct prehistoric animals
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