English Reference

Word

illustration

Phoneticsil·lus·tra·tion, stress on the third syllable

US/ˌɪɫəˈstɹeɪʃən/

UK/ˌɪləstɹˈeɪʃən/

Definitions

01a picture

B1 · Intermediate Countable noun

n. a picture, drawing, or diagram in a book, magazine, or advertisement.

n. a visual representation, such as a drawing or photograph, intended to decorate or clarify a text.

“The children's book has a beautiful illustration of a dragon on every page.”

“The textbook includes a detailed illustration of the human heart to help students identify the different valves and chambers.”

02an example

B2 · Upper Intermediate Countable noun

n. an example or story that helps explain an idea or prove a point.

n. an instance, example, or comparison used to make a concept clearer or more easily understood.

“This story is a perfect illustration of why we should always tell the truth.”

“The professor provided a vivid illustration of the economic theory by describing the recent collapse of the local housing market.”

Synonyms

examplecase in pointdemonstration

03the act of explaining

C1 · Advanced Uncountable noun Formal

n. the act of making something clear or easy to understand.

n. the process or act of clarifying a statement or concept. Often uncountable in this abstract sense.

“The teacher used a diagram for the illustration of how the machine works.”

“The report was written with such clarity that further illustration of the primary findings was deemed unnecessary by the board.”

Antonyms

obscuration

04insurance projection

C2 · Proficiency Countable noun Law Technical · Formal

n. a document showing how much money you might pay or get back from an insurance plan.

n. a calculated projection of future premiums, cash values, and death benefits for a life insurance policy.

“The agent gave me an illustration showing how my savings might grow over twenty years.”

“The policy illustration clearly outlines the guaranteed and non-guaranteed elements of the life insurance contract based on current interest rates.”

Usage

Commonly used in the financial services and insurance industries.

Collocations

Common phrases and expressions where native English speakers use the word “illustration” in context.

Verb

01. provide an illustration

“The author provides a clear illustration of the economic theory in the first chapter.”

verb + noun

02. serve as an illustration

“This case study serves as an illustration of the challenges faced by small businesses.”

verb + prep + noun

Adjective

03. detailed illustration

“The textbook contains a detailed illustration of the human heart.”

adj + noun

04. graphic illustration

“The news report provided a graphic illustration of the damage caused by the storm.”

adj + noun

05. vivid illustration

“The documentary gave a vivid illustration of life in the deep ocean.”

adj + noun

Noun

06. book illustration

“She specialized in children's book illustration after graduating from art school.”

noun + noun

Preposition

07. by way of illustration

“By way of illustration, let me show you the sales figures from last year.”

prep + noun + prep

Real-World Examples

“Hanlon’s whimsical illustrations are drawn as a brilliant child might create them.”
The Conversation 14 Aug 2026
“In short websites for the book in English and Spanish , website designer Mavila Trujillo used illustrations, video, photos and audio recordings with short text to make some of that conviviality more visible.”
The Conversation 5 Aug 2026
“For Eichenberg, the process of illustration turned reading into a visual activity.”
JSTOR Daily 27 May 2026
“A digital illustration of typical prokaryotes—cells that do not contain a nucleus.”
Smithsonian Magazine 5 Aug 2026

Etymology

From Middle French illustration, from Latin illūstrātiō, from illūstrō (“I illustrate”). By surface analysis, illustrate + -ion.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

NOUN

illustration(B2)

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Frequent
Level
B2 · Upper IntermediateOxford
Updated

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