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  1. Extinction | Definition & Examples | Britannica

    Nov 2, 2025 · Extinction, in biology, is the dying out or extermination of a species. It occurs when species are diminished because of environmental forces (natural or human-made) or because …

  2. Extinction - Wikipedia

    In ecology, extinction is sometimes used informally to refer to local extinction, in which a species ceases to exist in the chosen area of study, despite still existing elsewhere.

  3. Extinction - National Geographic Society

    Oct 19, 2023 · Extinction is the dying out of a species. Extinction plays an important role in the evolution of life because it opens up opportunities for new species to emerge.

  4. What is extinction? The answer is complicated. - National …

    What is extinction? The answer is complicated. From locally extinct to functionally extinct, here are the various ways scientists track species’ decline.

  5. What Is Extinction? Causes, History, and Current Crisis

    Jul 19, 2025 · Extinction is the permanent termination of a species. When a species becomes extinct, all its members have died, marking an irreversible end to a unique evolutionary …

  6. EXTINCTION Definition & Meaning - Merriam-Webster

    Dec 6, 2016 · The meaning of EXTINCTION is the act of making extinct or causing to be extinguished. How to use extinction in a sentence.

  7. Extinction Definition, Facts, and Examples | Species Survival Science

    Extinction is when an entire species completely disappears from Earth. This means that every single animal or plant of that kind has died, and there are none left anywhere in the world. …

  8. EXTINCTION | English meaning - Cambridge Dictionary

    Ecosystems are not being maintained, safety factors are ignored, species extinction persists at an unprecedented level, and our very global life-support systems are under threat.

  9. EXTINCTION Definition & Meaning | Dictionary.com

    EXTINCTION definition: the act of extinguishing. See examples of extinction used in a sentence.

  10. Extinction - New World Encyclopedia

    In biology and ecology, extinction is the ceasing of existence of a species or a higher taxonomic unit (taxon), such as a phylum or class. The moment of extinction is generally considered to be …