millennium

play
noun mil·len·ni·um \mə-ˈle-nē-əm\

Definition of millennium

plural

millennia

play \-nē-ə\ or

millenniums

  1. 1a :  the thousand years mentioned in Revelation (see revelation 3) 20 during which holiness is to prevail and Christ is to reign on earthb :  a period of great happiness or human perfection

  2. 2a :  a period of 1000 years; especially :  one reckoned from the beginning of the Christian era at the start of the third millenniumb :  a 1000th anniversary or its celebration In 2015 the city of Leipzig, Germany, celebrated its millennium.

Examples of millennium in a Sentence

  1. The book describes the changes that have occurred in the landscape over many millennia.

  2. The year 2000 was celebrated as the beginning of the third millennium.

Recent Examples of millennium from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'millennium'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Did You Know?

Since in Latin mille means "thousand", a millennium lasts 1,000 years. Thus, we're living today at the beginning of the third millennium since the birth of Christ. But some religious sects, relying on a prophecy in the biblical Book of Revelation, speak of a coming millennium when Jesus will return to reign on earth for 1,000 years, evil will be banished, and all will live in peace and happiness. Members of these sects who keep themselves in a constant state of preparedness are called millenarians or millennialists.

Origin and Etymology of millennium

New Latin, from Latin mille thousand + New Latin -ennium (as in biennium)


First Known Use: circa 1638

Other Calendar Terms



MILLENNIUM Defined for English Language Learners

millennium

play
noun

Definition of millennium for English Language Learners

  • : a period of 1,000 years

  • : a period of a thousand years counted from the beginning of the Christian era


MILLENNIUM Defined for Kids

millennium

play
noun mil·len·ni·um \mə-ˈle-nē-əm\

Definition of millennium for Students

plural

millennia

\-nē-ə\ or

millenniums

  1. 1 :  a period of 1000 years

  2. 2 :  a 1000th anniversary or its celebration

millennial

\-nē-əl\ adjective


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