Millénnium. n.s. [Latin.] A thousand years; generally taken for the thousand years, during which, according to an ancient tradition in the church, grounded on a doubtful text in the Apocalypse, our blessed Saviour shall reign with the faithful upon earth after the resurrection, before the final completion of beatitude.
We must give a full account of that state called the millennium. Burnet's Theory of the Earth.