illuminate

1 of 3

verb

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

transitive verb

1
a(1)
: to supply or brighten with light
(2)
: to make luminous or shining
b
: to enlighten spiritually or intellectually
c
: to subject to radiation
d
archaic : to set alight
2
a
: to make clear : elucidate
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

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
Another recent progress photo taken on April 14 using one of the live webcams on site captured the bright Milky Way flowing above the telescope's dome, illuminated by stars shining in the night sky. Samantha Mathewson, Space.com, 23 Apr. 2025 The scariest episode of this Doctor Who season also was an illuminating one, for showrunner Russell T Davies. Matt Webb Mitovich, TVLine, 23 Apr. 2025 With a talented eye for lighting, Villarreal has installed statement pieces throughout the apartment that add warmth and drama, including a glittering 40-inch disco ball that illuminates the living room like a discotheque. Lisa Boone, Los Angeles Times, 22 Apr. 2025 Reuther’s advocacy illuminates how free trade wasn’t the villain in the story of deindustrialization that it has long been made out to be. Made By History, Time, 21 Apr. 2025 See All Example Sentences for illuminate

Word History

Etymology

Verb

Middle English, from Latin illuminatus, past participle of illuminare, from in- + luminare to light up, from lumin-, lumen light — more at luminary

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 28 Apr. 2025.

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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