Extinction means the complete disappearance or dying out of a species of plants or animals. It occurs when there are no more individuals of that species left alive on the planet. Full definition
The current annual rate of extinction of species far exceeds any plausible rate of generation of species. (religion.blogs.cnn.com)
The African elephant is classified as «vulnerable» and is facing a high risk of extinction in the wild. (laughingelephantyoga.com)
In other words, if we lose all currently threatened species, we will be on a course for a new mass extinction event in just over 500 years. (treehugger.com)