illustrate

Concise Oxford English Dictionary © 2008 Oxford University Press:
illustrate/ˈɪləstreɪt/

▶verb

• 1 provide (a book or periodical) with pictures.

• 2 make clear by using examples, charts, etc.

  ■ serve as an example of.

– derivatives
illustrator noun.

– origin C16 (earlier (ME) as illustration): from L. illustrat-, illustrare ‘light up’.