Definition of extinction

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  • extinction is a valid Scrabble US word with a point value of 19
  • extinction is a valid Scrabble UK word with a point value of 19
  • extinction is a valid Words with friends word with a point value of 22

Definition of extinction

  • complete annihilation (noun)

    Examples

    1. they think a meteor cause the extinction of the dinosaurs

    Synonyms

    1. extermination
  • the act of extinguishing; causing to stop burning (noun)

    Examples

    1. the extinction of the lights

    Synonyms

    1. extinguishing
    2. quenching
  • no longer in existence (noun)

    Examples

    1. the extinction of a species

    Synonyms

    1. defunctness
  • a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus (noun)

    Synonyms

    1. experimental extinction
  • no longer active; extinguished (noun)

    Examples

    1. the extinction of the volcano
  • the reduction of the intensity of radiation as a consequence of absorption and radiation (noun)

See definition of extinction in Merriam Webster