形容词

1. （计划、想法）空想的，不切实际的
If you describe a plan or idea as utopian, you are criticizing it because it is unrealistic and shows a belief that things can be improved much more than is possible.

2. （政治或宗教思想）空想的，乌托邦式的
Utopian is used to describe political or religious philosophies which claim that it is possible to build a new and perfect society in which everyone is happy.