1. n. 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.
2. n. A squalid place of resort; a wretched dwelling place; a haunt; as, a den of vice.
3. n. Any snug or close retreat where one goes to be alone.
4. n. A narrow glen; a ravine; a dell.
5. v. i. To live in, or as in, a den
He lieth in wait secretly as a lion in his den: he lieth in wait to catch the poor: he doth catch the poor, when he draweth him into his net.
And the sucking child shall play on the hole of the asp, and the weaned child shall put his hand on the cockatrice' den.
Is this house, which is called by my name, become a den of robbers in your eyes? Behold, even I have seen it, saith the LORD.