1. serving to illuminate or shed light on something; clarifying or explaining
2. relating to or producing light; luminous
Usage: less common than 'illuminating' in modern usage

Examples

• The professor's illuminative comments helped students understand the complex theory.
• Her research provided an illuminative perspective on the historical event.
• The documentary offered illuminative insights into the artist's creative process.
• His illuminative explanation made the difficult concept accessible to everyone.
• The study presents illuminative evidence about climate change patterns.
• The book's illuminative approach to the subject made it a bestseller.