Meaning of WARREN in English

war ‧ ren /ˈwɒrən $ ˈwɔː-, ˈwɑː-/ BrE AmE noun [countable]

[ Date: 1300-1400 ; Language: Old North French ; Origin: warenne ]

1 . the underground home of rabbits

2 . a place with so many streets, rooms etc that it is difficult to find the place that you want:

a warren of tiny streets

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.