'Extinct' definitions:

Definition of 'extinct'

From: WordNet
adjective
No longer in existence; lost or especially having died out leaving no living representatives; "an extinct species of fish"; "an extinct royal family"; "extinct laws and customs" [syn: extinct, nonextant] [ant: extant]
adjective
(of e.g. volcanos) permanently inactive; "an extinct volcano" [ant: active]
adjective
Being out or having grown cold; "threw his extinct cigarette into the stream"; "the fire is out" [syn: extinct, out(p)]

Definition of 'Extinct'

From: GCIDE
  • Extinct \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. [1913 Webster]
  • Light, the prime work of God, to me is extinct. --Milton. [1913 Webster]
  • 2. Without a survivor; without force; dead; as, a family becomes extinct; an extinct feud or law. [1913 Webster]
  • 3. Specifically: 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. [PJC]

Definition of 'Extinct'

From: GCIDE
  • Extinct \Ex*tinct"\, v. t. To cause to be extinct. [Obs.] --Shak. [1913 Webster]