Pronunciation: (mi-len'ē-um),[key] —n., —pl.-ni•ums, -ni•aPronunciation: (-nē-u).[key] 1. a period of 1000 years.
2. the millennium, the period of a thousand years during which Christ will reign on earth. Rev. 20:1–7.
3. a period of general righteousness and happiness, esp. in the indefinite future.
4. a thousandth anniversary.