dreamland

Bored with the classroom lecture, she drifted off to dreamland. [=she started daydreaming]她感到课堂讲授很无聊，便慢慢进入了神游状态。

(disapproving) He's in dreamland [=he's dreaming] if he thinks he can get by without a full-time job.如果他认为没有一份全职工作也可以维持生活，那他是在做梦！

He's living in a dreamland.他生活在一个幻想世界里。