Definition of millennium
- at the start of the third millennium
- In 2015 the city of Leipzig, Germany, celebrated its millennium.
The book describes the changes that have occurred in the landscape over many millennia.
The year 2000 was celebrated as the beginning of the third millennium.
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Since in Latin mille means "thousand", a millennium lasts 1,000 years. Thus, we're living today at the beginning of the third millennium since the birth of Christ. But some religious sects, relying on a prophecy in the biblical Book of Revelation, speak of a coming millennium when Jesus will return to reign on earth for 1,000 years, evil will be banished, and all will live in peace and happiness. Members of these sects who keep themselves in a constant state of preparedness are called millenarians or millennialists.
: a period of 1,000 years
: a period of a thousand years counted from the beginning of the Christian era
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