Definitions
1.AdjectiveOf fire, etc.: no longer alight; of a light, etc.: no longer shining; extinguished, quenched."Edward’s cigarillo was extinct by the time he had finished talking."
2.AdjectiveOf 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."Luckily, such ideas about race are extinct in current sociological theory.; The title became extinct when the last baron died.; Dinosaurs have been extinct for millions of years.; Most of the volcanos on this island are now extinct.; They found the sites of extinct geysers."
3.AdjectiveOf feelings, a person's spirit, a state of affairs, etc.: put out, as if like a fire; quenched, suppressed.
4.AdjectiveOf 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."Luckily, such ideas about race are extinct in current sociological theory.; The title became extinct when the last baron died."
5.AdjectiveOf 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)"Dinosaurs have been extinct for millions of years."
6.AdjectiveOf a geological feature: no longer active; specifically, of a volcano: no longer erupting."Most of the volcanos on this island are now extinct.; They found the sites of extinct geysers."
7.AdjectiveOf a radioisotope: no longer occurring primordially due to having decayed away completely, because it has a relatively short half-life.
8.AdjectiveOf a person: dead; also, permanently separated from others.
9.VerbSynonym of extinguish.
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.
To cause (an animal or plant species) to die out completely or become extinct (adjective etymology 1 sense 2.3).
10.VerbTo stop (fire, etc.) from burning; also, to stop (light, etc.) from shining; to put out, to quench.
11.VerbTo kill (someone).
12.VerbTo 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 etymology 1 sense 2.3).
13.VerbTo cause (an animal or plant species) to die out completely or become extinct (adjective etymology 1 sense 2.3).
14.VerbTo suppress (something, as feelings, a person's spirit, a state of affairs, etc.); to quench.
15.VerbTo abolish or make void (a law, a legal right, etc.); also, to cancel (a creditor's claim, a license, etc.).
16.NounSynonym of extinction (“the action of becoming or making extinct; annihilation”).