# illuminate

/ˌɪˈɫumɪnɪt/ (US) · /ɪlˈuːmɪnˌeɪt/ (UK) · CEFR C1 · Verb

Source: https://englishreference.com/word/illuminate
Updated: 2026-05-06

## Definition

to light up a place or an object. It can also mean to make a difficult idea much easier to understand.

For teachers: to supply or brighten with light; to clarify or explain a subject by providing additional information. Often used metaphorically in academic contexts to describe the resolution of intellectual obscurity.

## Examples

- The bright streetlights illuminate the dark alley.
- The professor used a simple analogy to illuminate the complex laws of physics for the first-year students.
- While the primary purpose of the floodlights was to illuminate the stadium, they also served to highlight the architectural details of the surrounding historic buildings.

## Usage notes

- The verb is transitive and requires a direct object; it is frequently used in both literal and figurative contexts.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.