- of or pertaining to a thousand, especially the thousand years of the prophesied millennium.
- of or pertaining to the millennium, especially of Christian prophecy, or millennialism.
1550s, "one who believes in the coming of the (Christian) millennium," from L. millenarius (see millennium) + -ian. As an adj., from 1630s.
"After the Battle of Armageddon would follow the second coming of Christ, when his elected would reign in happiness and prosperity for a thousand years. Much of what Darby preached was not new, but he wove the strands of earlier millenarianism and prophecy into a tightly spun system of his own, supported by Biblical texts, then communicated it to his followers in his endless writings and during his impassioned speaking tours."
- Caroline Moorehead, Village of Secrets