vi to live in, or as in, a den.
2. den ·noun a narrow glen; a ravine; a dell.
3. den ·noun any snug or close retreat where one goes to be alone.
4. den ·noun a squalid place of resort; a wretched dwelling place; a haunt; as, a den of vice.
5. den ·noun a small cavern or hollow place in the side of a hill, or among rocks; ·esp., a cave used by a wild beast for shelter or concealment; as, a lion's den; a den of robbers.