/
mɪˈlɛnɪəm/
n.
(pl. millennia
/-nɪə/
or millenniums)
- a period of a thousand years, especially when calculated from the traditional date of the birth of Christ.
▸
(the millennium)
Christian Theology the prophesied thousand-year reign of Christ at the end of the age (Rev. 20:1–5).
▸a utopian period.
- an anniversary of a thousand years.
-
(the millennium)
the point at which one period of a thousand years ends and another begins.
Derivative
Usage
The correct spelling is millennium, with two ns. The spelling with one n is a common error, formed by analogy with other similar words correctly spelled with only one n, such as millenarian.
Etymology
C17: mod. L., from L. mille ‘thousand’, on the pattern of biennium.