millennium
/mɪˈlɛnɪəm/
Proposed by a contributor, not yet supported by evidence.
Also seen as: millennia · millenniums
Sense 1
Meaning · English
A period of time consisting of one thousand years.
Noun
Examples
But these seekers, too, are saved - by virtue of the inherited symbolic aids of society, the rites of passage, the grace-yielding sacraments, given to mankind of old by the redeemers and handed down through millenniums.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 2
Meaning · English
The year in which one period of one thousand years ends and another begins, especially the year 2000.
Noun
Examples
A huge fireworks display was put on in Sydney to celebrate the millennium.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “millennium” mean?
A period of time consisting of one thousand years.
Is “millennium” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.