A dining room, especially one on an upper floor (traditionally the room in which the Last Supper took place).
A small circle or gathering of specialists (writers etc).
A comfortable room not used for formal entertaining.
Synonym of fort (“structure improvised from furniture, etc. for playing games.”)
A group of Cub Scouts of the same age who work on projects together.
A small cavern or hollow place in the side of a hill, or among rocks; especially, a cave used by a wild animal for shelter or concealment.
A squalid or wretched place; a haunt.
To ensconce or hide oneself in (or as in) a den.