extinct

US /ɪkˈstɪŋkt/

UK /ɪkˈstɪŋkt/

1.

no longer in existence

:

•

Dinosaurs have been extinct for millions of years.

•

The dodo bird is an extinct species.

:

vanished defunct dead

:

alive existing living

2.

a volcano that is no longer active and is unlikely to erupt again

:

•

Mount Kilimanjaro is an extinct volcano.

•

Scientists confirmed the volcano is extinct and poses no threat.

:

inactive dead

:

active dormant

:

extinction