Hibernation
WordNet
noun
(1) The act of retiring into inactivity
"He emerged from his hibernation to make his first appearance in several years"
(2) Cessation from or slowing of activity during the winter; especially slowing of metabolism in some animals
(3) The torpid or resting state in which some animals pass the winter
WiktionaryText
Noun
- A winter-long sleep in which bears, deer, and other organisms grow a thick coat of fur and store fat.
- The act or state of hibernating.