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;*&&*a hiding place;
They lured the bear out of its den.
There was a den of foxes nearby.
Bears give birth in these dens.
Many people were compelled to hide in caves and dens .
Nests are typically found near dens or caves.
Females use dens to give birth and to shelter kits.
The fox carried her cub back to the den.
The snakes den up during the winter.
The bears left the den in a desperate search for food.