1.
The ~ of a species of animal or plant is the death of all its remaining living members.
An operation is beginning to try to save a species of crocodile from ~...
N-UNCOUNT
2.
If someone refers to the ~ of a way of life or type of activity, they mean that the way of life or activity stops existing.
The loggers say their jobs are faced with ~ because of declining timber sales.
N-UNCOUNT