millennium
       n 1: a span of 1000 years
       2: (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
       3: the 1000th anniversary (or the celebration of it)
       [also: millennia (pl)]