English Reference
noun

illustration

n.
US /ˌɪɫəˈstɹeɪʃən/ UK /ˌɪləstɹˈeɪʃən/ il·lus·tra·tion UK spelling illustrations

  1. 01 B1 Intermediate

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

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

    Simple

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

    In context

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

  2. 02 B2 Upper Intermediate

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

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

    Simple

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

    In context

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

    examplecase in pointdemonstration
  3. 03 C1 Advanced Formal

    the act of making something clear or easy to understand.

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

    Simple

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

    In context

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

    obscuration
  4. 04 C2 Proficiency TechnicalFormal Law

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

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

    Simple

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

    In context

    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.

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

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.

This entry
Origin Latin illūstrātiō
Level B2 · Upper Intermediate
Frequency Frequent
Updated