apartment

Noun

apartment (plural apartments)

1. (Australia, Canada, Philippines, US) A complete domicile occupying only part of a building, especially one for rent; a flat.
   • apartment dwellers
   • I am Jonathan. I am in apartment B4. — I am in apartment C2.2016, VOA Learning English (public domain)

   Synonyms:

   flat, unit, condominium

2. (archaic) A suite of rooms within a domicile, designated for a specific person or persons and including a bedroom.
   • By this contrivance I got into the inmost court; and, lying down upon my side, I applied my face to the windows of the middle stories, which were left open on purpose, and discovered the most splendid apartments that can be imagined. There I saw the empress and the young princes in their several...1726 October 28, [Jonathan Swift], “Mildendo, the Metropolis of Lilliput, Described, together with the Emperor’s Palace. […]”, in Travels into Several Remote Nations of the World. […] [Gulliver’s...
3. A room within a house.
   • For the matter of that, it is difficult to make a nice, genteel sitting-room out of an apartment of which the principal features are a sink and a big gas stove.1913, Marie Adelaide Belloc Lowndes, The Lodger
4. (obsolete) A division of an enclosure that is separate from others; a compartment.
   • The specification described the ordinary fare-box used in street cars and omnibuses, consisting of two apartments, the one directly above the other.... [T]he passenger deposited his fare in an aperture in the top of the upper apartment. It fell upon and was arrested by a movable platform.... This...1883 April 23, Slawson v. Grand Street R. Co., 107 U.S. 649, 2 S.Ct. 663, 664
5. (COM) A conceptual space used for separation in the threading architecture. Objects in one apartment cannot directly access those in another, but must use a proxy.