From Longman Dictionary of Contemporary Englishwarrenwar‧ren /ˈwɒrən $ ˈwɔː-, ˈwɑː-/ noun [countable] 1 HBAthe underground home of rabbits2 COMPLICATEDa place with so many streets, rooms etc that it is difficult to find the place that you want a warren of tiny streets
Examples from the Corpus
warren• It was certainly a warren to admire.• Thus some warrens can be emptied of their stock for short periods, and particularly so while the predatory intrusions continue.• Some warrens are so extensive they can range over as much as 50 acres or take in a complete gravel working.• It is your bad luck if the warren you choose to ferret is one of these.• If the warren system is a big one it may require two guns to do the killing.• The warren rabbits didn't show themselves at once.Origin warren (1300-1400) Old North French warenne 