hibernation
1. [ noun ] cessation from or slowing of activity during the winter; especially slowing of metabolism in some animals
Related terms: dormancy hibernate
2. [ noun ] (medicine) the torpid or resting state in which some animals pass the winter
Related terms: torpor hibernate
3. [ noun ] (work) the act of retiring into inactivity
Examples:

"he emerged from his hibernation to make his first appearance in several years"

Related terms: retirement
Similar spelling:   hibernating
  hibernate
  Hibernia
  hibernal