a set of rooms, usually on one floor of a larger building, where a person or family lives.
After college, Mia rented her first apartment in the city center.
The smell of fresh coffee drifted through the apartment on Sunday morning.
✦ Borrowed into American English in the 17th century from French "appartement", itself from Italian "appartamento", related to "appartare" (to separate), originally describing separate sets of rooms.
a grand or special set of rooms for an important person in a palace, large house, or hotel.
The king withdrew to his private apartment after the ceremony.
Visitors can tour the royal apartments at the castle.
✦ Same origin as the modern meaning—derived from French "appartement"—but historically referred to separate suites of rooms in palaces.