noun

millennium

millennium, a thousand years

The castle was built over a millennium ago.

The castle was built over a millennium ago.

We celebrated the new millennium in 2000.

We celebrated the new millennium in 2000.

a millennium a period of 1000 years The castle was built over a millennium ago.

Synonyms: era, epoch, age

From Latin 'mille' (thousand) + 'annus' (year).

'Mille' means thousand (like in millimeter). 'Ennium' sounds like 'annual' (year). So, a thousand years.

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