penthouse

/ˈpɛnthaʊs/
noun
  1. A luxurious apartment or set of rooms on the top floor of a building.
    • The billionaire bought a penthouse with a panoramic view of the city.
    • Their penthouse has a private terrace and a swimming pool.
    • She dreamed of living in a penthouse overlooking Central Park.
  2. A structure built on the roof of a building, often used as a living space or for mechanical equipment.
    • They converted the rooftop penthouse into a small apartment for the caretaker.
    • The architect designed a glass penthouse that blends with the skyline.
    • The building's penthouse houses the elevator machinery and water tanks.
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