Definition of "extinct"

Which bringeth foorth the charet and horse, the armie and the power: they shall lie downe together, they shall not rise: they are extinct, they are quenched as towe.

1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], Isaiah 43:17

Most of the lamps were extinct, but they glittered golden in the morning light, and in some few a pale white flame yet struggled with day.

1834, L[etitia] E[lizabeth] L[andon], chapter XXVII, in Francesca Carrara. […], volume I, London: Richard Bentley, […], (successor to Henry Colburn), page 311

The ex-G.C. Class A5 4-6-2T, of which No. 69820 was one, is now extinct.

1961 January, Trains Illustrated, page 59, photo caption

Indeed the very fact that the English spelling system writes in there as two words but therein as one word might be taken as suggesting that only the former is a productive syntactic construction in Modern English, the latter being a now extinct construction which has left behind a few fossil remnants in the form of compound words such as thereby.

1988, Andrew Radford, chapter 5, in Transformational grammar: a first course, Cambridge, UK: Cambridge University Press, page 275

I am fully convinced that species are not immutable; but that those belonging to what are called the same genera are lineal descendants of some other and generally extinct species, in the same manner as the acknowledged varieties of any one species are the descendants of that species.

1859 November 24, Charles Darwin, On the Origin of Species by Means of Natural Selection, […], London: John Murray, […]

Wrex: And before you die, I want you to know I'm calling off our support for Earth! If my people go extinct, so do yours!

2012, BioWare, Mass Effect 3 (Science Fiction), Redwood City: Electronic Arts, PC, scene: Citadel

Make loues quicke pants in Deſdemonaes Armes, / Giue renew'd fire to our extincted Spirits.

c. 1603–1604 (date written), William Shakespeare, “The Tragedie of Othello, the Moore of Venice”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act II, scene i], page 316, column 2

Paleontologists determine which animal species were extincted, and geomorphologists can find cycles of soil erosion.

2013, Steven A. LeBlanc, Katherine E. Register, Constant Battles: The Myth of the Peaceful, Noble Savage, St. Martin's Press