The complete disappearance or elimination of a particular group of organisms or species from the Earth; it occurs when no members of the group remain alive.
Related terms
Biodiversity Loss: The reduction in variety and abundance of different species within an ecosystem over time; often associated with human-induced causes.
Mass Extinction Event: A period in Earth's history where a significant number of existing species become extinct within a relatively short period.
Habitat Destruction: The process by which natural habitats are damaged or destroyed, leading to the loss of species that depend on those habitats.