An apartment is a self-contained housing unit that occupies only part of a building. In the USA and Canada an "apartment" means a flat.
In Russia an "apartment" means a flat-like unit of commercial (non-living) realty. They are cheaper than flats, but water and electricity tariffs in apartments (commercial realty) are bigger than in flats (living realty). Technically, apartments looks like a flat.
Apartment may also refer to:
Apartment (London band), a UK alternative rock band
Apartment (Bristol band), an English post-punk band
Apartment (film), a 2010 Bollywood film
Apartment (Custard song), 1995
Apartment (Young the Giant song), 2010
The Apartment, a 1960 American film
The Apartment (1996 film), a French film directed by Gilles Mimouni
"The Apartment" (Seinfeld), a 1991 episode of Seinfeld
The Apartment (album), a 1974 album by jazz saxophonist Dexter Gordon
The Apartments, an Australian indie band
"The Apartment", an episode of Full House
Multi-Threaded Apartment, in Microsoft’s Component Object Model (COM)