1. providing insight or understanding; enlightening
2. providing light; brightening

Examples

• The documentary was illuminating and changed my perspective on the issue.
• Her illuminating explanation helped students understand the complex theory.
• The professor’s illuminating lecture made the difficult concept clear.
• Reading his biography provided illuminating insights into his character.
• The candles were illuminating the dark room with a warm glow.
• The lighthouse’s illuminating beam guided ships safely to shore.
• The illuminating streetlights made the path visible at night.