- 1a room in a house where people go to relax, watch television, etc.
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- 2the hidden home of some types of wild animals a bear's/lion's den
- 3(disapproving) a place where people meet in secret, especially for some illegal or immoral activity a den of thieves a drinking/gambling den He thought of New York as a den of iniquity.
- 4a group of Cub Scouts Idioms
a difficult situation in which you have to face a person or people who are unfriendly or aggressive toward you
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