1. serving as a prelude or introduction; preliminary
Usage: formal; literary

Examples

• The professor’s prolusory remarks set the tone for the entire lecture series.
• Her prolusory comments briefly outlined the main themes of the presentation.
• The opening chapter serves a prolusory function in the novel.
• His prolusory speech prepared the audience for the complex discussion to follow.
• The prolusory exercises helped students understand the basic concepts.
• The concert began with a prolusory piece that introduced the evening’s musical themes.