01 a. Extinguished; put out; quenched; as, a fire, a light, or a lamp, is extinct; an extinct volcano.
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1.
Extinguished; put out; quenched; as, a fire, a light, or a lamp, is extinct; an extinct volcano.“Light, the prime work of God, to me is extinct.” — Milton.
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2.
Without a survivor; without force; dead; as, a family becomes extinct; an extinct feud or law.
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3.
Once existing as a species but now having no living members; -- used of species of living organisms, especially of animals and plants; as, dinosaurs are now extinct; the dodo bird is extinct.