Looking for the meaning or definition of the word millenarian? Here's what it means.
Adjective
(Christianity) Pertaining to the belief in an impending period of one thousand years of peace and righteousness associated with the Second Coming of Christ. [from 17th c.]
Pertaining to any of various religious or social movements which believe in a coming radical change to existing world order; utopian, apocalyptic. [from 20th c.]