utopian (adj.)youdaoicibaDictYouDict[utopian 词源字典]
1550s, with reference to More's fictional country; 1610s as "extravagantly ideal, impossibly visionary," from utopia + -an. As a noun meaning "visionary idealist" it is recorded by 1832 (also in this sense was utopiast, 1845).[utopian etymology, utopian origin, 英语词源]