What is the meaning of the word "rabbit warren"?

Definitions:

  1. A building or place with many connected rooms, passages, etc., where you can get lost easily. copy to clipboard NOUN
    • The Pentagon is a rabbit warren of corridors. copy to clipboard
  2. A network of interconnected burrows and tunnels created by rabbits. copy to clipboard NOUN
    • The dense thicket of vegetation was a perfect habitat for a rabbit warren, providing ample shelter and food. copy to clipboard
  3. An overcrowded residential area. copy to clipboard NOUN
    • The disorganized city block was a rabbit warren of narrow streets and tightly packed houses. copy to clipboard
  4. Serves as a rabbit's living quarters, providing shelter, a place to raise their young, and protection from predators and harsh weather conditions. copy to clipboard NOUN
    • Ecologists studied the rabbit warren to understand the social structure and behavior of the rabbit colony. copy to clipboard

Synonyms: