(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.