Verb: hole up
- [informal] Remain secluded or in hiding
"He is writing his book and is holing up in his study"
- Sleep during winter
"Bears must eat a lot of food before they hole up in their caves";
- hibernate
Derived forms: holed up, holing up, holes up
Type of: catch some Z's [N. Amer, informal], hide, hide out [informal], sleep, slumber