dreamland

Từ điển Oxford Advanced Learner 8th

dream·land [dreamland dreamlands] BrE [ˈdriːmlænd] NAmE [ˈdriːmlænd] noun uncountable (especially BrE, disapproving)
a pleasant but not very realistic situation that only exists in your mind
•You must be living in dreamland if you think he'll change his mind.