n.[C]

1. 梦魇；恶梦
   In his nightmares they burned his house.

   在他的噩梦中，他们烧了他的房子。

2. 梦魇般的经历；恐怖的事
   Her first few days in that foreign land were a total nightmare.

   她刚到达异邦的那几天简直像是一场噩梦。

n.

1. a frightening or unpleasant dream.
2. a very unpleasant experience or prospect.