0 a house or other building where crack (= a form of the illegal drug cocaine that can be smoked) is sold, bought, and used:
An unarmed man has been shot and injured by police in a raid on a crack den.
As gentrification creeps in, middle-class settlers are fixing up 19th-century town houses that were once rooming houses, crack dens or mere shells.
In an attempt to stamp out gun crime police will concentrate on closing down crack dens, which are linked to the use of firearms.
Cocaine has moved from crack dens on inner-city estates to middle-class dinner parties.
