millennium

A decade means ten years, a century means a hundred, and millennium means a thousand. Think: a decade of marriage, the new millennium.

In Latin, in the Romance languages, and in the metric system, mille refers to a thousand. A millimeter is a thousandth of a meter, a milliliter a thousandth of a liter, a millennium is a thousand years. Think of the number "one million" as a thousand thousands, and you'll get the idea.

Definitions of millennium
  1. noun
    a span of 1000 years
    synonyms: millenary
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    type of:
    period, period of time, time period
    an amount of time
  2. noun
    the 1000th anniversary (or the celebration of it)
    synonyms: millenary
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    type of:
    anniversary, day of remembrance
    the date on which an event occurred in some previous year (or the celebration of it)
  3. noun
    (New Testament) in Revelations it is foretold that those faithful to Jesus will reign with Jesus over the earth for a thousand years; the meaning of these words have been much debated; some denominations (e.g. Jehovah's Witnesses) expect it to be a thousand years of justice and peace and happiness
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    type of:
    doctrine, ism, philosophical system, philosophy, school of thought
    a belief (or system of beliefs) accepted as authoritative by some group or school
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