A person who imagines or proposes a utopia; an advocate of social reform; = "utopian". Chiefly depreciative, with connotations of idle speculation and impracticality.
Origin
Mid 19th century; earliest use found in The Times. From utopian + -ist. Compare earlier utopianism.
Definition of utopianist in US English:
utopianist
noun
A person who imagines or proposes a utopia; an advocate of social reform; = "utopian". Chiefly depreciative, with connotations of idle speculation and impracticality.
Origin
Mid 19th century; earliest use found in The Times. From utopian + -ist. Compare earlier utopianism.