| v.  il·lus·trat·ed, il·lus·trat·ing, il·lus·trates  v.tr. 1.  a.  To clarify or explain, as by the use of examples or comparisons: The mayor illustrated the problem with an anecdote. b.  To serve as an example or clarification of: a story that illustrates a broader social problem. 2.  To provide (a text) with explanatory or decorative images: illustrated the book with colorful drawings. 3.  Obsolete   To light up; illuminate. v.intr.  To present a clarification, example, or explanation. [Latin illūstrāre, illūstrāt- : in-, in; see  IN-2 + lūstrāre, to make bright; see  leuk- in the Appendix of Indo-European roots.] illus·trat′a·ble adj. illus·tra′tor n. | 
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