extinct

Short definition from Wiktionary

Adjective

1. 1
   Of fire, etc.: no longer alight; of a light, etc.: no longer shining; extinguished, quenched.
2. 2
   Of feelings, a person's spirit, a state of affairs, etc.: put out, as if like a fire; quenched, suppressed.
3. 3
   Of customs, ideas, laws and legal rights, offices, organizations, etc.: no longer existing or in use; defunct, discontinued, obsolete; specifically, of a title of nobility: no longer having any person qualified to hold it.
4. 4
   Of an animal or plant species, a class of people, a family, etc.: having died out completely; no longer in existence.
5. 5
   Of a geological feature: no longer active; specifically, of a volcano: no longer erupting.
6. 6
   Of a radioisotope: no longer occurring primordially due to having decayed away completely, because it has a relatively short half-life.
7. 7
   Of a person: dead; also, permanently separated from others.

Verb

1. 1
   Synonym of extinguish: To stop (fire, etc.) from burning; also, to stop (light, etc.) from shining; to put out, to quench.
2. 2
   Synonym of extinguish: To kill (someone).
3. 3
   Synonym of extinguish: To put an end to (something) completely; to annihilate, to destroy.
4. 4
   To put an end to (something) completely; to annihilate, to destroy: To cause (an animal or plant species) to die out completely or become extinct (adjective sense 2.3).
5. 5
   Synonym of extinguish: To suppress (something, as feelings, a person's spirit, a state of affairs, etc.); to quench.
6. 6
   Synonym of extinguish: To abolish or make void (a law, a legal right, etc.); also, to cancel (a creditor's claim, a licence, etc.).

Noun

1. 1
   Synonym of extinction (“the action of becoming or making extinct; annihilation”).