millennium

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

Definition of millennium

plural

-nia

\-nē-ə\ or

millenniums

  1. 1 a :  the thousand years mentioned in Revelation 20 during which holiness is to prevail and Christ is to reign on earth b :  a period of great happiness or human perfection

  2. 2 a :  a period of 1000 years; especially :  one reckoned from the beginning of the Christian era <at the start of the third millennium> b :  a 1000th anniversary or its celebration

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.

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 mil·len·ni·um \mə-ˈle-nē-əm\

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


Seen and Heard

What made you want to look up millennium? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a Mesopotamian temple tower

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • alphabet-magnets
  • Which is the correct spelling?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ