1. to explain or make something clear by giving examples
2. to provide pictures, diagrams, or drawings for a book, article, or other text
3. to serve as an example of something

Examples

• The teacher used charts to illustrate the concept of photosynthesis.
• This incident illustrates the need for better safety measures.
• The children’s book was beautifully illustrated with colorful drawings.
• She illustrated her point with several real-world examples.
• The artist was hired to illustrate the magazine article.
• His behavior perfectly illustrates what we’ve been discussing.
• The textbook is illustrated with helpful diagrams and photos.