(countable and uncountable, plural millenarianisms)
A belief in a coming religious millennium, especially (Christianity) the belief in a coming thousand-year reign of peace heralded by the Second Coming of Christ; utopianism, belief in a coming era of peace and prosperity. [from 19th c.]
The attribution of a mystic significance to the millennium-period, though perhaps not prominent in that theory of Christian eschatology to which the names Millenarianism and Chiliasm (from Gr.
Augustine's (erroneous) interpretation of the Millennium (Rev. xx.), as a parable of the Church's historic triumph, stands for the final eradication of primitive " enthusiasm " in the great Church, though of course millenarianism has had many revivals in special circles.