1N-COUNT (狮子、狐狸等野生动物的)兽穴,兽窝 A den is the home of certain types of wild animals such as lions or foxes. (狮子、狐狸等野生动物的)兽穴,兽窝
2N-COUNT (家里用来学习、工作或从事业余爱好的)书房,私室 Your den is a quiet room in your house where you can go to study, work, or carry on a hobby without being disturbed. (家里用来学习、工作或从事业余爱好的)书房,私室 [US]
3N-COUNT (通常指为了从事非法活动的)秘密聚集处,窝点,巢穴 A den is a secret place where people meet, usually for a dishonest purpose. (通常指为了从事非法活动的)秘密聚集处,窝点,巢穴
I could provide you with the addresses of at least three illegal drinking dens.
我可以为你提供至少 3 处非法饮酒窝点的地址。
...the crack dens of urban America.
美国城市中的可卡因毒窟
4N-COUNT (某一不良行为或非法活动的猖獗)场所,渊薮 If you describe a place as a den of a particular type of bad or illegal behaviour, you mean that a lot of that type of behaviour goes on there. (某一不良行为或非法活动的猖獗)场所,渊薮
...the one-bedroomed flat that was to become his den of savage debauchery. [+ of]