The preface or introduction to a discourse, poem, or performance; as, the prologue of Chaucer's "Canterbury Tales;" esp., a discourse or poem spoken before a dramatic performance
A popular government without popular information or the means of acquiring it, is but a prologue to a farce, or a tragedy, or perhaps both. James Madison
Courtship is to marriage, as a very witty prologue to a very dull play. William Congreve
A deliberate choice on my part was for the player to continue to find new possibilities in the early Attic rooms far into the game. I think this builds atmosphere, though it means there's no neat division of the prologue from the middle game. Graham Nelson
