<p><strong>Noun</strong></p><ul><li>A preliminary discourse; a preface or introductory part of a discourse, poem, or novel.</li><li>An introductory speech, often in verse, calling attention to the theme of a play.</li><li>The actor or actress who delivers the introductory speech that calls attention to the theme of a play.</li><li>An introductory scene, preceding the first act of a play, opera, etc.</li><li>Any introductory proceeding, event, etc. (e.g., appetizing delicacies were the prologue to a long dinner).</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) pro·logued, pro·logu·ing. To introduce with or as if with a prologue.</li></ul>