"Hibernation mode" refers to a state where a person, animal, or electronic device enters a deep sleep or rest for a prolonged period of time, slowing down their activity and conserving energy. Full definition
The spacecraft was put into hibernation mode in 2011 after twice scanning the entire sky, thereby completing its main objectives. (sciencedaily.com)
After months of being wrapped up in blankets and layered in our wooliest jumpers, it can be hard to switch out of hibernation mode. (superchargedfood.com)