[1] : The Collaborative International Dictionary of English v.0.48

illustrative \illus"trative\, a.
   1. tending or designed to illustrate, exemplify, or
      elucidate.
      1913 webster

   2. making illustrious. obs.
      1913 webster

[2] : WordNet (r) 2.0

illustrative
     adj 1: clarifying by use of examples syn: exemplifying
     2: serving to demonstrate syn: demonstrative
see also:
exemplifying demonstrative 

[3] : Moby Thesaurus II by Grady Ward, 1.0

50 moby thesaurus words for "illustrative":
   allegorizing, annotative, apish, clarifying, critical, delineatory,
   demonstrative, demythologizing, depictive, echoic, editorial,
   elucidative, embodying, enlightening, euhemeristic, exegetic,
   exemplificative, explaining, explanatory, explicative, explicatory,
   expositive, expository, figurative, glossarial, graphic,
   ideographic, illuminating, illuminative, illustrational, imitative,
   incarnating, limning, mimetic, mimish, onomatopoeic, personifying,
   pictographic, pictorial, portraying, rationalistic, rationalizing,
   representational, representative, representing, scholiastic,
   simulative, symbolizing, typifying, vivid

Illustrative >> I Words
Illustrative, definition of term: Illustrative
illustrative_pag1.html