/ əˈpɑːtmənt; NAmE əˈpɑːrt-/ noun
1.
( especially NAmE ) a set of rooms for living in, usually on one floor of a building
—compare condominium , flat
2.
a set of rooms used for a holiday / vacation :
self-catering holiday apartments
3.
[ usually pl. ] ( BrE ) a room in a house, especially a large or famous house :
You can visit the whole palace except for the private apartments.
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WORD ORIGIN
mid 17th cent. (denoting a private suite of rooms): from French appartement , from Italian appartamento , from appartare to separate, from a parte apart.