millenniumnoun [ C ]
uk/mɪˈlen.i.əm/us/mɪˈlen.i.əm/plural millennia millenniumsC2 a period of 1,000 years, or the time when a period of 1,000 years ends:
The corpse had lain preserved in the soil for almost two millennia.
Compare
century
the millennium
the beginning of a new millennium in the year 2000:
How did you celebrate the millennium?
More examples
- The book is a history of the last two millennia.
- Imagine what the world will be like at the end of the next millennium.
Thesaurus: synonyms and related words
Decades, centuries & the millennium
- century
- decade
- eighties
- fifties
- fin-de-siècle
- forties
- millennial
- nineties
- noughties
- seventies
- sixties
- teens
- the
- thirties
- twenties