1. speaking or writing at length in a preliminary or introductory manner
Usage: present participle of prologize; formal

Examples

• The professor spent too much time prologizing before getting to the main topic.
• She was prologizing about the historical context when the bell rang.
• Instead of prologizing, he jumped straight into his presentation.
• The author was criticized for prologizing excessively in the opening chapters.
• After prologizing for ten minutes, the speaker finally addressed the audience’s concerns.