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millennium

Syllabification: (mil·len·ni·um)

Pronunciation: /məˈlenēəm/

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Definition of millennium

noun (plural millennia /-ˈlenēə/ or millenniums)

1a period of a thousand years, especially when calculated from the traditional date of the birth of Christ.
(the millennium) Christian Theology the prophesied thousand-year reign of Christ at the end of the age (Rev. 20:1-5).
(the millennium) a utopian period of good government, great happiness, and prosperity.

2an anniversary of a thousand years:the millennium of the Russian Orthodox Church
(the millennium) the point at which one period of a thousand years ends and another begins.

Origin:

mid 17th century: modern Latin, from Latin mille 'thousand', on the pattern of biennium

The spelling of millennium is less difficult if one remembers that it comes ultimately from two Latin words containing double letters: mille, ‘thousand,’ and annum, ‘year.’.

Spell millennium with a double l and a double n. The plural can be spelled either millennia (like the original Latin) or millenniums.

millennium in other Oxford dictionaries

Definition of millennium in the British & World English dictionary

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