From Longman Dictionary of Contemporary Englishrabbit warrenˈrabbit ˌwarren noun [countable] 1 HBAan area under the ground where a lot of wild rabbits live SYN warren, → burrow2 TTRTBBa building with a lot of narrow passages, or a place with a lot of narrow streets, where you can easily get lost SYN warren
Examples from the Corpus
rabbit warren• Elsewhere, extensive pillow mounds show that the site was used as a rabbit warren later on.• I can't remember ever bolting a weasel from a rabbit warren.• They've tried to search that rabbit warren but it's impossible. 