outbuilding

详细解释:n. 外屋
【经】 附属建筑物

英语解释：

名词 outbuilding:

a building that is subordinate to and separate from a main building

详细解释：

out.build.ing

n.（名词）
A building separate from but associated with a main building.
附属的房屋：与主要建筑物相关连但却独立的房屋