adjective Of 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.
adjective 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.
Luckily, such ideas about race are extinct in current sociological theory.
adjective Of feelings, a person's spirit, a state of affairs, etc.: put out, as if like a fire; quenched, suppressed.
adjective 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.
adjective 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)
Dinosaurs have been extinct for millions of years.
adjective Of a geological feature: no longer active; specifically, of a volcano: no longer erupting.
Most of the volcanos on this island are now extinct.
adjective Of a radioisotope: no longer occurring primordially due to having decayed away completely, because it has a relatively short half-life.
adjective Of a person: dead; also, permanently separated from others.