What is the meaning of Extinct?

Of fire, etc.: no longer alight; of a light, etc.: no longer shining; extinguished, quenched.

1. Of feelings, a person's spirit, a state of affairs, etc.: put out, as if like a fire; quenched, suppressed.
2. Of customs, ideas, laws and legal rights, offices, organizations, languages, 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.

   Of feelings, a person's spirit, a state of affairs, etc.: put out, as if like a fire; quenched, suppressed.

   Of customs, ideas, laws and legal rights, offices, organizations, languages, 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.

   Of an animal or plant species or group of species, a group of people, a family, etc., having no living members, representatives, or descendants. (Discuss this sense)

   Of a geological feature: no longer active; specifically, of a volcano: no longer erupting.

   Of a radioisotope: no longer occurring primordially due to having decayed away completely, because it has a relatively short half-life.

   Of a person: dead; also, permanently separated from others.

   Synonym of extinguish.

   1. To stop (fire, etc.) from burning; also, to stop (light, etc.) from shining; to put out, to quench.
   2. To kill (someone).
   3. To put an end to (something) completely; to annihilate, to destroy.
      2. To cause (an animal or plant species) to die out completely or become extinct (adjective etymology 1 sense 2.3).

         To stop (fire, etc.) from burning; also, to stop (light, etc.) from shining; to put out, to quench.

         To kill (someone).

         To put an end to (something) completely; to annihilate, to destroy.

         2. To cause (an animal or plant species) to die out completely or become extinct (adjective etymology 1 sense 2.3).

            To cause (an animal or plant species) to die out completely or become extinct (adjective etymology 1 sense 2.3).

            To suppress (something, as feelings, a person's spirit, a state of affairs, etc.); to quench.

            To abolish or make void (a law, a legal right, etc.); also, to cancel (a creditor's claim, a licence, etc.).

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

            Source: wiktionary.org