extinct Definition

extinct
adj

1. Said of a species of animal, etc: no longer in existence.

Thesaurus: obsolete, gone, lost, dead, vanished, defunct, exterminated.
2. Said of a volcano: no longer active.
3. formal
Said of an emotion, etc: no longer felt; dead.

Derivative: extinction

The process of making or becoming extinct; elimination or disappearance.

The total elimination or dying out of any plant or animal species, or a whole group of species, worldwide.

Etymology: 15c: from Latin exstinguere, exstinctum to extinguish.