illuminate

1 of 3

verb

il·​lu·​mi·​nate i-ˈlü-mə-ˌnāt How to pronounce illuminate (audio)
illuminated; illuminating
Synonyms of illuminatenext

transitive verb

1
a(1)
: to supply or brighten with light
candles illuminating a church
(2)
: to make luminous or shining
b
: to enlighten spiritually or intellectually
a career educator who illuminated hundreds of students
c
: to subject to radiation
d
archaic : to set alight
2
a
: to make clear : elucidate
an explanation that illuminated the situation
b
: to bring to the fore : highlight
a crisis can illuminate how interdependent we all are
3
: to make illustrious or resplendent
4
: to decorate (something, such as a manuscript) with gold or silver or brilliant colors or with often elaborate designs or miniature pictures
illuminator noun

illuminate

2 of 3

adjective

il·​lu·​mi·​nate i-ˈlü-mə-nət How to pronounce illuminate (audio)
1
archaic : brightened with light
2
archaic : intellectually or spiritually enlightened

illuminate

3 of 3

noun

il·​lu·​mi·​nate i-ˈlü-mə-nət How to pronounce illuminate (audio)
archaic
: one having or claiming unusual enlightenment

Synonyms of illuminate

Examples of illuminate in a Sentence

Verb the part of the moon illuminated by the sun A university study has illuminated the problem.
Recent Examples on the Web
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Verb
Then, the camera turns to Iris, her face illuminated by the embers. Carlos Aguilar, Variety, 31 Jan. 2026 February begins with snow on the ground in some parts of the world and a Snow Moon illuminating the night sky. Julia Gomez, USA Today, 31 Jan. 2026 Once stationary, deactivate all lights except the hazard flashers, engage the emergency brake, and release the brake pedal to ensure your tail lights are not illuminated, reducing the risk of other drivers colliding with your stationary vehicle. Bay Area Weather Report, Mercury News, 30 Jan. 2026 The idea of an electric light bulb illuminating a room would be mesmerizing for many Americans at the time, but for Benjamin and first lady Caroline Harrison, bringing electricity into their home left them scared. Paloma Chavez, PEOPLE, 29 Jan. 2026 See All Example Sentences for illuminate

Word History

Etymology

Verb

Middle English illuminaten "to enlighten spiritually," borrowed from Latin illūminātus, past participle of illūmināre "to give light to, light up, brighten" (Medieval Latin, "to enlighten spiritually or intellectually, decorate [a manuscript]"), from il- il- + -lūmināre, derivative of lūmen "light, source of light" — more at lumen

Adjective

Middle English, borrowed from Latin illūminātus, past participle of illūmināre "to give light to, light up, brighten" — more at illuminate entry 1

Noun

probably derivative of illuminate entry 2, in part after illuminati

First Known Use

Verb

15th century, in the meaning defined at sense 1b

Adjective

15th century, in the meaning defined at sense 1

Noun

1602, in the meaning defined above

Time Traveler
The first known use of illuminate was in the 15th century

Browse Nearby Words

Cite this Entry

“Illuminate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/illuminate. Accessed 1 Feb. 2026.

Kids Definition

illuminate

verb
il·​lu·​mi·​nate
il-ˈü-mə-ˌnāt
illuminated; illuminating
1
: to supply with light : light up
illuminate a room
the part of the moon illuminated by the sun
2
: to make clear : explain
illuminated the point with good examples
3
: to decorate with designs or pictures in gold or colors
illuminate a manuscript
illuminative
-ˌnāt-iv
adjective
illuminator
-ˌnāt-ər
noun

More from Merriam-Webster on illuminate

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