millennian

Adjective

millenarian (comparative more millenarian, superlative most millenarian)

1. Pertaining to the belief in an impending period of one thousand years of peace and righteousness associated with the Second Coming of Christ and his reign on earth.
   • Franciscans coming from Iberia were particularly prone to the millenarian enthusiasm which gripped southern Europe around 1500, and which the Franciscan Order had so long fostered. They believed that they were living in the End Times […]2009, Diarmaid MacCulloch, A History of Christianity, Penguin, published 2010, page 699

   Synonyms:

   millennial

2. Pertaining to any of various religious or social movements which believe in a coming or ongoing radical change to existing world order.
   • Restoration of the old empires was not the aim of the totalitarian revolutions in Russia and Germany, since both wanted to bring back the millenarian empire.2007, Bryan-Paul Frost, Daniel J. Mahoney, editors, Political Reason in the Age of Ideology, page 182
3. Lasting or expected to last a thousand years.
   • […] contrasts with the rapid decline and demise of the millenarian empire of Byzantium.1994, Catalan Review, volume 8, page 222

See all 4 meanings of millenarian