WordWeb Online

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

Derived forms: hibernated, hibernates, hibernating

See also: hibernation

Type of: catch some Z's, kip [Brit], log Z's, rest, sleep, slumber

Antonym: estivate

Encyclopedia: Hibernate