extinction

noun ex·tinc·tion \ ik-ˈstiŋ(k)-shən \

Definition of extinction

1 :the act of making extinct or causing to be extinguished
2 :the condition or fact of being extinct or extinguished; also :the process of becoming extinct
  • extinction of a species
3 :the process of eliminating or reducing a conditioned response by not reinforcing it

Examples of extinction in a Sentence

  1. the extinction of all life in the region

  2. the extinction of many old traditions

  3. Mass extinctions of prehistoric animals are known to have occurred.

Recent Examples of extinction from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'extinction.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of extinction

15th century


EXTINCTION Defined for English Language Learners

extinction

noun

Definition of extinction for English Language Learners

  • : the state or situation that results when something (such as a plant or animal species) has died out completely


EXTINCTION Defined for Kids

extinction

noun ex·tinc·tion \ ik-ˈstiŋk-shən \

Definition of extinction for Students

:the state of being, becoming, or making extinct

Medical Dictionary

extinction

noun ex·tinc·tion \ ik-ˈstiŋ(k)-shən \

medical Definition of extinction

1 :the process of becoming extinct
  • the extinction of a species
; also :the condition or fact of being extinct
2 :the process of eliminating or reducing a conditioned response by not reinforcing it


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