WordWeb Online

1. (biology) in a condition of biological rest or suspended animation
   "a hibernating bear";
   - dormant, torpid

1. Sleep during winter
   "Bears must eat a lot of food before they hibernate in their caves";
   - hole up
    
2. Be in an inactive or dormant state
    
3. (computing) enter a standby state with very low power usage without losing the contents of memory, often by temporarily storing the contents of memory on disk
   "The computer hibernates after it has been idle for a while"

See also: asleep, sleeping

Type of: catch some Z's [N. Amer, informal], rest, sleep, slumber

Encyclopedia: Hibernating