Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun millennium

3 senses of millennium

Sense 1
millennium, millenary -- (a span of 1000 years)
       => time period, period of time, period -- (an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period")

Sense 2
millennium -- ((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)
       => doctrine, philosophy, philosophical system, school of thought, ism -- (a belief (or system of beliefs) accepted as authoritative by some group or school)

Sense 3
millennium, millenary -- (the 1000th anniversary (or the celebration of it))
       => anniversary, day of remembrance -- (the date on which an event occurred in some previous year (or the celebration of it))