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.