extinct

To cease to be. Usually used to refer to an entire species of animal or plant that has completely died out. Dinosaurs, the passenger pigeon, and the dodo have become extinct; all other species of life will eventually face that fate -- well, maybe not the cockroach.

Ex*tinct" (?), a. [L. extinctus, exstinctus, p. p. of extinguere, exstinguere. See Extinguish.]

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.

2.

Without a survivor; without force; dead; as, a family becomes extinct; an extinct feud or law.

© Webster 1913.

Ex*tinct", v. t.

To cause to be extinct.

Shak.

© Webster 1913.