millennium
1 ENTRIES FOUND:
Britannica Dictionary definition of MILLENNIUM
[count]
1
:
a period of 1,000 years
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The book describes the changes that have occurred in the landscape over many millennia.
2
:
a period of a thousand years counted from the beginning of the Christian era
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The year 2000 was celebrated as the beginning of the third millennium.
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We had a party to celebrate the millennium. [=the beginning of the millennium]
