Webster’s Revised Unabridged Dictionary · 1913
Millenarian
Mil′le·na′ri·an (mĭl′lē·nā′rĭ·an), a. [See Millenary.] Consisting of a thousand years; of or pertaining to the millennium, or to the Millenarians.
Mil′le·na′ri·an, n. One who believes that Christ will personally reign on earth a thousand years; a Chiliast.