A building — a structure where people live, work, or carry out activities; a general everyday term for houses, buildings, etc.
大きな建物が並んでいる通りだ。
It's a street lined with large buildings.
あの建物は図書館です。
That building is a library.
古い建物は取り壊される予定だ。
The old building is scheduled to be demolished.
建物の中にエレベーターがあります。
There is an elevator inside the building.