Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A sudden collapse of a species or of a population or community of organisms, as from disease or environmental disruption.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The act or process of dying off; extinction.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From die off.

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