someone who believes in an apocalyptic millennium, an Adventist.
One who thinks that Christ will physically reign in the world one thousand years; a Chiliast.
person who thinks into the millennium; more particularly, one that believes that Christ will visibly reign on earth together with saints for one thousand years or even for an indefinite time period prior to the end worldwide; a chiliast. See millennium.
a person who believes when you look at the coming associated with the millennium (a period of good serenity and prosperity)