millenarian

UK: /ˌmɪlɪˈnɛərɪən/ US: (mil′ə nâr′ē ən)

WordReference Random House Unabridged Dictionary of American English © 2025

mil•le•nar•i•an  (mil′ə nâr′ē ən), adj. 

1. of or pertaining to a thousand, esp. the thousand years of the prophesied millennium.
2. Theology of or pertaining to the millennium, esp. of Christian prophecy, or millennialism:
   millenarian zeal.

n. 

3. a believer in the coming of the millennium.

• millenary + -an 1545–55

Collins Concise English Dictionary © HarperCollins Publishers::

millenarian / ˌmɪlɪˈnɛərɪən/, millenary adjective

1. of or relating to a thousand or to a thousand years
2. of or relating to the millennium or millenarianism

noun

1. an adherent of millenarianism