What does prolog mean?
A prolog is an introduction placed before the principal part of a work, performance, or presentation. In drama, it may be a speech or scene that establishes the setting, introduces characters, or prepares the audience for the main action. It can also refer to a preliminary section in a book, manual, or computer program that supplies context or instructions. The related form prologue is fully established in English and may sound more traditional, especially in literary and theatrical discussion, while prolog is particularly common in American English. As a verb, to prolog means to provide or act as an introduction, though this use is much less common than the noun. The word is useful when an introduction serves a distinct preliminary function rather than simply beginning the work informally.
An introductory speech, scene, or section appearing before the main part of a work, performance, presentation, or computer program.
"The play's prolog announces that the story will be told through the memories of an old friend."
Prolog and prologue are both standard; prologue is often preferred in literary and theatrical discussion, while prolog is especially common in American English.
To provide or serve as an introductory section or performance.
"A recorded message prologs the exhibition and welcomes the first visitors."
This verbal use is uncommon compared with the noun.
The usual plural is prologs; the alternate spelling prologue regularly takes the plural prologues.
"The book opens with two prologs addressed to different audiences."
Literally meaning “before speech,” a prolog introduces what the audience is about to hear or read.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does prolog come from?
The word comes from Latin prologus, from Ancient Greek prologos, a compound of pro-, meaning “before,” and logos, meaning “word,” “speech,” or “discourse.” Its literal sense, “before speech,” reflects its traditional role as an opening address before a dramatic performance. Related English words preserve the Greek elements, including prologue, epilogue, dialogue, and monologue.
Related word forms
How prolog is actually used
In general literary and theatrical use, prolog and prologue are both accepted, with prologue often sounding more traditional and prolog more frequent in American usage. The verb is relatively uncommon.
Easily confused with prolog
Both words can mean an introduction, but prolog is especially common in American English, while prologue is the more traditional form in literary and dramatic contexts.