Definition of illustration
1
: something that serves to illustrate: such as
a
: a picture or diagram that helps make something clear or attractive
b
: an example or instance that helps make something clear
2a
: the action of illustrating : the condition of being illustrated
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Which Word Does Not Belong?
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- Which of these words does not mean "nonsense"?

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Merriam-Webster unabridged
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Time Traveler for illustration
The first known use of illustration was in the 14th century
See more words from the same century