1. prologue - Noun
2. prologue - Verb
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
To introduce with a formal preface, or prologue.
Source: Webster's dictionaryWhat is past is prologue. William Shakespeare
Therefore another prologue must tell he is not a lion. William Shakespeare
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. Knowledge will forever govern ignorance: And a people who mean to be their own Governors, must arm themselves with the power which knowledge gives. James Madison
Courtship is to marriage, as a very witty prologue to a very dull play. William Congreve
This is the start, the beginning The prologue to the yarn that you're spinning A million synonyms will never get close to describe the feeling. Tomas Kalnoky
What is Past is Prologue. Nigerian Proverb