definition of
illustration

[1] #1 illustration n. artwork that helps make something clear or attractive. wn

[2] #2 illustration n. [exemplification] showing by example. wn

[3] #3 illustration n. [example, instance, representative] an item of information that is typical of a class or group; "this patient provides a typical example of the syndrome"; "there is an example on page 10". wn

[4] #4 illustration n. a visual representation (a picture or diagram) that is used make some subject more pleasing or easier to understand. wn