'hole up' definitions:

Definition of 'hole up'

From: WordNet
verb
Remain secluded or in hiding; "He is writing his book and is holing up in his study"
verb
Score a hole in one
verb
Sleep during winter; "Bears must eat a lot of food before they hibernate in their caves" [syn: hibernate, hole up] [ant: aestivate, estivate]

Synonyms of 'hole up'

From: Moby Thesaurus