Synonyms of extinct

extinct

adjective

ik-ˈstiŋ(k)t 

as in defunct

no longer existing

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

Synonyms & Similar Words

• defunct
• vanished
• gone
• expired
• obsolete
• done
• departed
• dead
• bygone
• faded
• fallen
• dying
• antiquated
• nonexistent
• nonextant
• moribund
• bypast
• collapsed
• lost
• terminated
• dated
• missing
• lapsed
• passé
• finished
• overthrown

Antonyms & Near Antonyms

• alive
• existing
• extant
• living
• active
• existent
• dynamic
• thriving
• vibrant

Example Sentences

Recent Examples of extinct

Tasmanian tigers, otherwise known as thylacines, have been extinct since 1936. — Taylor Dotson, Scientific American, 10 July 2026

Some of the species went extinct during the many decades covered by the data. — Christopher A. Lepczyk, The Conversation, 8 July 2026

The ancient Moa Eggshell Cave in New Zealand contains the remains of several extinct animal species lost approximately a million years ago. — Devika Rao, TheWeek, 6 July 2026

Excavators uncovered stone artifacts and bones of Stegodon florensis insularis, a bison-size extinct relative of elephants, near the Homo floresiensis fossils. — Ashley Strickland, CNN Money, 3 July 2026