Meaning of “illustration” in the English Dictionary

"illustration" in British English

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illustrationnoun [ C or U ]

uk /ˌɪl.əˈstreɪ.ʃən/ us /ˌɪl.əˈstreɪ.ʃən/

illustration noun [ C or U ] (PICTURE)

C1 a picture in a book, magazine, etc. or the process of illustrating something:

a full-page illustration
colour/black and white illustrations

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illustration noun [ C or U ] (EXAMPLE)

C2 an example that explains or proves something:

This delay is a perfect illustration of why we need a new computer system.
A couple of examples are included, by way of illustration (= to show the meaning more clearly).

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(Definition of “illustration” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"illustration" in American English

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illustrationnoun [ C/U ]

us /ˌɪl·əˈstreɪ·ʃən/

a picture:

[ C ] Look at the illustration on page 37.

An illustration is also an example that makes something easier to understand, or the giving of such examples:

[ C ] That’s a perfect illustration of the problem.

(Definition of “illustration” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"illustration" in Business English

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illustrationnoun [ C or U ]

uk /ˌɪləˈstreɪʃən/ us

an example that shows something:

In our illustration of how much your initial investment might be worth at term, we are assuming an 8% rate of return.

(Definition of “illustration” from the Cambridge Business English Dictionary © Cambridge University Press)