1. the act of speaking or writing at length about a subject; elaborate discussion or discourse
Usage: formal; often used in academic or literary contexts

Examples

• The professor's expatiation on Renaissance art lasted nearly two hours.
• Her expatiation about the novel's themes impressed the entire class.
• Without further expatiation, he summarized his findings in a single paragraph.
• The author's expatiation on historical details enriched the narrative.
• The speaker's lengthy expatiation tested the audience's patience.
• His expatiation covered every aspect of the philosophical argument.