- a picture or drawing in a book, magazine, etc.
- The illustration on page 30 shows the parts of an engine.
- a book with many photographs and illustrations
- The illustrations that he provided in his speech were very effective.
- the act or process of producing or providing pictures for a book, magazine, etc.
- They selected photographs to use for the illustration of the book.
- Illustration is the key to good communication.
- By way of illustration, [=as an example] let us examine this poem.