disapproval 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. He was pursuing a utopian dream of world prosperity A complete absence of national border controls is as utopian today as the vision of world government. = idealistic
Of or pertaining to Utopia; resembling Utopia; hence, ideal; chimerical; fanciful; founded upon, or involving, imaginary perfections; as, Utopian projects; Utopian happiness
an idealistic (but usually impractical) social reformer; "a Utopian believes in the ultimate perfectibility of man" characterized by or aspiring to impracticable perfection; "the dim utopian future"; "utopian idealists"; "recognized the utopian nature of his hopes" of or pertaining to or resembling a utopia; "a Utopian novel
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. His was a utopian vision of nature in its purest form