prologue Definition

prologue
noun

1a. theat.
A speech addressed to the audience at the beginning of a play;
1b. theat.
The actor delivering it.
2. A preface to a literary work.

Thesaurus: introduction, prelude, foreword, preamble, preface, preliminary, exordium, proem, prolegomenon.
3. An event serving as an introduction or prelude.

verb

prologued, prologuing
1. To introduce or preface something with a prologue.

Etymology: 13c: from Greek prologos, from logos discourse.