den

/dɛn/
noun
  1. The home or resting place of a wild animal, such as a lion, bear, or fox.
    • The lioness guarded her cubs inside the rocky den.
    • The bear slept in its den all winter long.
    • We found a fox den hidden under the old tree roots.
  2. A room in a house used for relaxing, reading, or watching television.
    • The family gathered in the den to watch the movie.
    • My dad spends most evenings reading in his den.
    • We have a cozy den with a big sofa and a TV.
  3. A secret place where people meet for illegal or harmful activities.
    • The police raided the thieves' den and arrested everyone inside.
    • The old warehouse was used as a den for illegal gambling.
    • They discovered a den of spies operating in the city.