Hibernation

n.

1.

The act or state of hibernating.

Noun	1.	hibernation - the torpid or resting state in which some animals pass the winter
	2.	hibernation - cessation from or slowing of activity during the winter; especially slowing of metabolism in some animals
	3.	hibernation - the act of retiring into inactivity; "he emerged from his hibernation to make his first appearance in several years"

beauty sleep, beddy-bye, bedtime, blanket drill, bye-bye, dormancy, doze, dreamland, drowse, fitful sleep, immobility, inaction, inactiveness, inactivity, inertia, land of Nod, light sleep, lull, motionlessness, quiescence, repose, shut-eye, silken repose, sleep, sleepland, sleepwalking, slumber, slumberland, snoozle, somnambulism, somniloquy, somnus, suspension, unconsciousness, underactivity, winter sleep