millennium
/mɪˈlɛnɪəm/ noun B2- A period of time consisting of one thousand years.
- The year in which one period of one thousand years ends and another begins, especially the year 2000. · A huge fireworks display was put on in Sydney to celebrate the millennium.
Plural millennia
From the library
By examining these microscopic pockets, we can construct highly accurate models of global climate patterns over hundreds of millennia.
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