IPA: /prəˈluːʒən/
KK: /prəˈluːʒən/
A preliminary activity or writing that serves as an introduction to a more detailed work or discussion.
The author included a prolusion to explain the main themes of the book before diving into the chapters.
Prolusion is formed from "pro-" (meaning before) and "lusio" (from Latin, meaning to play or sport). The word refers to a preliminary or introductory play or performance, setting the stage for what follows.
Think of something that happens 'before' ('pro-') a main event, like a warm-up or introduction, which is what prolusion signifies.