Definition of prologues:
(n) :
A speech or section used as an introduction, especially to a play or novel.
(v) :
To introduce with a formal preface, or prologue.
(n) :
One who delivers a prologue.
(n) :
(cycling) An individual time trial before a stage race, used to determine which rider wears the leader's jersey on the first stage.
(n) :
(Eastern Orthodoxy) A liturgical book containing daily readings, including hagiography.
(n) :
(computing) A component of a computer program that prepares the computer to execute a routine.