Rookery

Part of speech: noun (n.)

1. The breeding place of a colony of rooks; also, the birds themselves. Tennyson.

2. A breeding place of other gregarious birds, as of herons, penguins, etc.

3. The breeding ground of seals, esp. of the fur seals.

4. A dilapidated building with many rooms and occupants; a cluster of dilapidated or mean buildings.

5. A brothel. [Low]