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

Conservation efforts began in 1894, but the species nearly went extinct by the mid‑1900s. — Adela Suliman, NBC news, 1 Sep. 2026

In 2026, 60-game starters are nearly extinct — the Utah Mammoth’s Karel Vejmelka was the sole representative of that club last season. — Janson Duench, New York Times, 25 Aug. 2026

Admittedly, Mitchell is fairly creative in sketching the run-up to the dinosaur takeover, which includes ominous signs such as long-extinct plant life taking root overnight. — Peter Tonguette, The Washington Examiner, 22 Aug. 2026

The sounds of the terror bird (phorusrhacids) was based on a prototype, which was modeled on the larynx of an extinct terror bird species. — Jazz Tangcay, Variety, 21 Aug. 2026