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extinct

[ik-stingkt] /ɪkˈstɪŋkt/
adjective
1.
no longer in existence; that has ended or died out:
an extinct species of fish.
2.
no longer in use; obsolete:
an extinct custom.
3.
extinguished; quenched; not burning.
4.
having ceased eruption; no longer active:
an extinct volcano.
Origin
late Middle English
1400-1450
1400-50; late Middle English < Latin ex(s)tinctus put out, quenched, past participle of ex(s)tinguere to extinguish
Related forms
nonextinct, adjective
unextinct, adjective
Can be confused
extinct, rare, scarce.
Synonyms
1. defunct, gone, vanished. See dead. 2. archaic. 3. out.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for un extinct

extinct

/ɪkˈstɪŋkt/
adjective
1.
(of an animal or plant species) having no living representative; having died out
2.
quenched or extinguished
3.
(of a volcano) no longer liable to erupt; inactive
4.
void or obsolete: an extinct political office
Word Origin
C15: from Latin exstinctus quenched, from exstinguere to extinguish
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for un extinct

extinct

adj.

early 15c., from Latin extinctus/exstinctus, past participle of extinguere/exstinguere (see extinguish). Originally of fires; the sense of the condition of "dying out" of a family or a hereditary title, 1580s; of species by 1768. Cf. extinction.

Online Etymology Dictionary, © 2010 Douglas Harper
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un extinct in Science
extinct
  (ĭk-stĭngkt')   
  1. Having no living members. Species become extinct for many reasons, including climate change, disease, destruction of habitat, local or worldwide natural disasters, and development into new species (speciation). The great majority of species that have ever lived—probably more than 99 percent—are now extinct.

  2. No longer active or burning, as an extinct volcano.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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