/'wɒrən; [US] 'wɔ:rən; `wɔrən/ n
1 area of land with many burrows in which rabbits live and breed 兔子繁殖场; 养兔场.
2 (fig 比喻) (usu over-populated) building or district with many narrow passages, where it is difficult to find one's way （通常为过分拥挤的）多狭窄通道易迷路的建筑或地区
*lost in a warren of narrow streets 在纵横交错的狭窄街道上迷了路.

n[C]
[Date: 1300-1400; Language: Old North French;Origin: warenne]
the underground home of rabbits
a place with so many streets, rooms etc that it is difficult to find the place that you want
　a warren of tiny streets