n.后門;便門;旁門
adj.后面的;后門的
We slip out of the postern door of the castle. 我們從城堡的后門溜出。
Instead of taking the short cut along the Sound we went down the road and entered by the big postern. 我們沒有抄近路沿海邊過去,而是繞到大路上,從巨大的后門進去的。