- no longer in existence; that has ended or died out: an extinct species of fish.
- no longer in use; obsolete: an extinct custom.
- extinguished; quenched; not burning.
- having ceased eruption; no longer active: an extinct volcano.
Origin of extinct
1400–50; late Middle English < Latin ex(s)tinctus put out, quenched, past participle of ex(s)tinguere to extinguish
Synonyms for extinct
1. See dead.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (of an animal or plant species) having no living representative; having died out
- quenched or extinguished
- (of a volcano) no longer liable to erupt; inactive
- void or obsoletean extinct political office
Word Origin for extinct
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
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.
- No longer active or burning, as an extinct volcano.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.