Hibernation (noun)

1. The state of spending the winter in a dormant state, typically in a cave or burrow.
2. A state of reduced metabolic activity, usually in response to cold temperatures or reduced food availability.

Origin:

From the latin word hibernare meaning "to spend the winter".

Examples:

1. Bears enter hibernation in the fall and emerge in the spring.
2. Some species of frogs hibernate underground to survive the cold winter months.
3. The computer can be set to enter hibernation mode when not in use to save energy.
4. During hibernation, the animal's body temperature drops and the heart rate slows down.
5. Hibernation is a common survival strategy for many animals living in cold climates.