an idealistic (but usually impractical) social reformer
"a Utopian believes in the ultimate perfectibility of man"
Someone who supports or heralds the establishment of a utopia.
A person from Utopia, a fictional island, possessing a seemingly perfect socio-politico-legal system from Thomas More 1516 treatise of the same name.
characterized by or aspiring to impracticable perfection
"the dim utopian future"
"utopian idealists"
"recognized the utopian nature of his hopes"
Ideal but often impractical; visionary.