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
Thanks to a collaboration between Architecture Outfit and Damon Liss Design, the space holds a coastal luxury design where large windows naturally illuminate the room, darkening as day turns to night. Condé Nast, Condé Nast Traveler, 7 May 2026 These current findings clarify the relationship between the brain and physical movement, illuminating fundamental mechanics that can apply to other research, said Michael Goard, an associate professor at UC Santa Barbara who studies sensory and spatial processing. Los Angeles Times, 7 May 2026 His struggle no longer illuminates much of anything. Judy Berman, Time, 5 May 2026 But such moments when a TNO is illuminated by a star in the cosmic background, called stellar occultations, are rare opportunities to study the size, shape and features of a small, distant object, Arimatsu said. Ashley Strickland, CNN Money, 4 May 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 8 May. 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

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