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A power-off mode that preserves the last state of the computer. Turning the computer on after hibernating eliminates booting the operating system and reloading all the applications and data.

When hibernate is activated, the contents of memory (RAM) are written to storage (hard disk, SSD) and the computer is turned off. When turned back on again, the previous memory state is read from storage, and all applications appear exactly as they did the moment hibernate was triggered.

Hibernate vs. Sleep Mode
Hibernate is power off, whereas sleep mode is power on with the screen and hard disks turned off. In sleep mode, the RAM chips are constantly refreshed in order to retain their content, and the CPU is placed into a low-power state. Although restoring from hibernate is faster than a cold start, coming out of sleep is immediate. Turning the computer back on from either mode eliminates having to reload all applications and data.

Hybrid Modes
Some laptop computers invoke both modes automatically. When put into sleep mode by the user, the computer may automatically go into hibernate mode when the battery reaches a low level. An alternative hybrid mode activates hibernate when the computer enters sleep mode, but the computer is not turned off. If the battery runs out while in sleep mode, the contents of memory have already been saved. See memory.
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References in periodicals archive ?
A hibernator needs to protect its cells against oxidative damage occurring both over long periods while in torpor and during arousal as a result of the huge increase in oxygen consumption.
Effects of ambient temperature on metabolic rate, respiratory quotient, and torpor in an arctic hibernator. Am.
Wildlife biologists note that woodchucks are true hibernators and that means heart, respiration and overall metabolism rates are greatly reduced while the animal lives off stored fat reserves.
The most abundant hibernators in old country houses are cluster flies introduced from Europe.
You're all for hanging, but you wanna be selective about it, only committing if it works for you, It's great to escape, hibernator, but don't say no to opps just 'cause they don't fit your criteria of total R&R, So if a getaway with the tam comes up?
It involves all of the major muscle groups and requires a good range of motion in several joints--something the average winter hibernator might not be quite ready for.
It's enough to get even the most die-hard hibernator out into the winter air.
The brewery's portfolio includes Long Trail Ale, Double Bag, Blackbeary Wheat, Harvest Ale, and Hibernator.
Exide said the products include the StrongBox and Hibernator brands for off-road applications as well as the new Performance brand, geared toward all-terrain and light-duty automotive applications.
In "Midwinter Waking," it suggests the jerky, staccato quality of the hibernator's excited question: 34.
teniotis behaves as a classic thermo-conforming hibernator in the Alps, with torpor bouts lasting up to 8 d.
Not only did Nelson, who affectionately dubs her beloved "a hibernator," bring O'Neil sustenance from the world outside, but she also combed the city for discarded pieces of wood for O'Neil's other passion: painting.