[proh-lawg, -log] 
noun, verb, -logued, -logu⋅ing.| 1. | a preliminary discourse; a preface or introductory part of a discourse, poem, or novel. |
| 2. | an introductory speech, often in verse, calling attention to the theme of a play. |
| 3. | the actor or actress who delivers this. |
| 4. | an introductory scene, preceding the first act of a play, opera, etc. |
| 5. | any introductory proceeding, event, etc.: Appetizing delicacies were the prologue to a long dinner. |
| 6. | to introduce with or as if with a prologue. |
lɔg