Noun
amillennialism (uncountable)
(Christianity) A view in Christian eschatology that rejects the claimed future thousand-year physical reign of Jesus Christ on the earth, in opposition to premillennial and some postmillennial views of the Book of Revelation, chapter 20, claiming instead that the number of years in Revelation 20 is a symbolic number and that Christ's eventual physical reign will be permanent.
Amillennialism basically denies a future literal 1000 year kingdom and sees the church age metaphorically described in Rev. 20:1–6 in which "Christ's reign" is current in and through the church. Source: Internet