Meaning & Definition of Millennium in English

1. A span of 1000 years

2. (new testament) in revelations it is foretold that those faithful to jesus will reign with jesus over the earth for a thousand years

• The meaning of these words have been much debated

• Some denominations (e.g. jehovah's witnesses) expect it to be a thousand years of justice and peace and happiness

3. The 1000th anniversary (or the celebration of it)