(1):
(n.) A dilapidated building with many rooms and occupants; a cluster of dilapidated or mean buildings.
(2):
(n.) A brothel.
(3):
(n.) The breeding ground of seals, esp. of the fur seals.
(4):
(n.) A breeding place of other gregarious birds, as of herons, penguins, etc.
(5):
(n.) The breeding place of a colony of rooks; also, the birds themselves.