An illustration is a visualization such as a drawing, painting, photograph or other work of art that stresses subject more than form. The aim of an illustration is to elucidate or ...
http://en.wikipedia.org/wiki/Illustration

Artist blog, illustration postings and exhibits.
http://www.illustrationfriday.com/

A beautiful magazine devoted to the history of American illustration art. Entire contents of this website are © 2008 by The Illustrated Press, Inc.
http://www.illustration-magazine.com/

Illustration is an illustrator representative, agent, agency,for advertising, new media, digital, graphic design, editorial and publishing,. Artists represented by Illustration.
http://www.illustrationweb.com/

Book Illustration-Covers Royalty Free, Custom Design, Great Pricing, Fast Turnaround www.rapidpublishing.com
http://dictionary.reference.com/search?q=illustration