Merriam-Webster Online Dictionary
millennium (noun)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.
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
