illumination

noun

il·​lu·​mi·​na·​tion i-ˌlü-mə-ˈnā-shən 

1

: the action of illuminating or state of being illuminated: such as

a

: spiritual or intellectual enlightenment

b(1)

: a lighting up

(2)

: decorative lighting or lighting effects

c

: decoration by the art of illuminating

2

: the luminous flux per unit area on an intercepting surface at any given point

3

: one of the decorative features used in the art of illuminating or in decorative lighting

Synonyms

• explanation
• interpretation
• illustration

Examples of illumination in a Sentence

When taking photographs indoors, use a flash for illumination.

They traveled to the temple in search of spiritual illumination.

an old manuscript with beautiful illuminations

Recent Examples on the Web

But at a moment when many people are in a perpetual state of gloominess — courtesy of the news, social media doomscrolling or streaming/cable dramas that confuse lack of literal illumination with profundity — the pleasantly sunny escapism is difficult to resent. —Daniel Fienberg, HollywoodReporter, 23 Sep. 2025

Drenched in highly vibrant light for heightened illumination, each collage detail shimmers and the smallest symbols and textures are amplified to enhance the visual narrative. —Natasha Gural, Forbes.com, 19 Sep. 2025

Essentials include a navigation and communication device, sun protection, insulation such as extra clothes or a blanket, a first aid kit, illumination, a fire starter kit, repair kit, extra food, extra water and emergency shelter. —Mindy Sink, Denver Post, 17 Sep. 2025

Another shopper mentioned using one as a magnetic flashlight during car repairs, snapping to metal on the car’s chassis for hands-free illumination right where it’s needed. —Miles Walls, Better Homes & Gardens, 8 Sep. 2025

Word History

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for illumination

• abbreviation
• abomination
• acceleration
• accentuation
• accommodation
• accreditation
• acculturation
• accumulation
• acetylation
• adjudication
• administration
• adulteration

Kids Definition

illumination

noun

il·​lu·​mi·​na·​tion il-ˌü-mə-ˈnā-shən 

1

a

: the action of illuminating or state of being illuminated

b

: amount of light

2

: gold or colored decoration in a manuscript

Medical Definition

illumination

noun

il·​lu·​mi·​na·​tion il-ˌü-mə-ˈnā-shən 

1

: the action of supplying or brightening with light or the resulting state

2

: the luminous flux per unit area on an intercepting surface at any given point

called also illuminance

illuminate

il-ˈü-mə-ˌnāt 

transitive verb

illuminated; illuminating