Origin: Latin suffix -ive
Illustrative has 3 different meanings across 1 category:
clarifying by use of examples
"The teacher showed an illustrative diagram to help students understand how photosynthesis works."
serving to demonstrate
"The teacher showed an illustrative video to help students understand how photosynthesis works in real time."
Demonstrative, exemplative, showing an example or demonstrating.
"The teacher shared an illustrative story to show students how patience can solve complex problems."