noun

• (biology, sleep) A state of minimum power consumption, inactivity and metabolic depression in some animals during winter.
• (biology, sleep, space science) A hypothetical state of minimum power consumption, inactivity and metabolic depression in humans during long space flights.
• (computing) A standby state which conserves power by writing the contents of the memory to disk and completely power off the computer, in order that one will resume the session from the disk.