a large building or a structure characterized by a long roof; a single block or unit of a building complex
工場の古い棟が取り壊され、新しい倉庫に建て替えられた。
The factory's old building block was demolished and replaced with a new warehouse.
校舎は三つの棟に分かれており、図書館は中央の棟にある。
The school is divided into three buildings; the library is in the central block.
a counter/suffix for buildings or blocks (used like 'one building', 'two buildings')
その団地には全部で二十棟のマンションがある。
The housing complex has a total of twenty apartment buildings.
あの古い寺の本堂は一棟しか残っていない。
Only one building of that old temple, the main hall, remains.