Definition of dreamland noun from the Oxford Advanced Learner's Dictionary

 

dreamland

 noun
noun
BrE BrE//ˈdriːmlænd//
 
; NAmE NAmE//ˈdriːmlænd//
 
[uncountable](especially British English, disapproving)
 
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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.
See the Oxford Advanced American Dictionary entry: dreamland