apartment house

a building containing a number of residential apartments.

Also called apartment building.

Origin of apartment house

An Americanism dating back to 1870–75

Was their apartment-house friendship, however polished, worth the simple genuine fellowship I enjoyed among my present neighbors?

One Way Out |William Carleton
In the United States the term “apartment-house” is applied to what in England are called flats.

Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 4 |Various
Whether it came from the apartment-house or one of the private dwellings next to it, he was in doubt.

An Artist in Crime |Rodrigues Ottolengui
Now they reached the apartment-house district and slid past block after block of bulky living apartments.

The Secret Wireless |Lewis E. Theiss

The apartment-house, however, soars to heights that the tenement-house never half reached, and is sometimes ten stories high.

Through the Eye of the Needle |William Dean Howells