hibernate UK /ˈhaɪbə(r)ˌneɪt/US /ˈhaɪbəɹˌneɪt/ verb3 •To spend the winter in a dormant or inactive state of minimal activity, low body temperature, slow breathing and heart rate, and low metabolic rate; to go through a winter sleep.Hedgehogs and bears are two of the many mammals that hibernate in winter. •To enter a standby state which conserves power without losing the contents of memory.Your computer hibernates after it has been idle for the specified amount of time. — 2001 •To live in seclusion. formshibernated · hibernating · hibernates