brilliant

1 of 2

adjective

bril·​liant ˈbril-yənt How to pronounce brilliant (audio)
1
: very bright : glittering
a brilliant light
2
a
: striking, distinctive
a brilliant example
b
: distinguished by unusual mental keenness or alertness
brilliant scientists
3
British : very good : excellent
brilliantly adverb

brilliant

2 of 2

noun

: a gem (such as a diamond) cut in a particular form with numerous facets so as to have special brightness or brilliance

Illustration of brilliant

Illustration of brilliant
  • 1 table
  • 2 bezel
  • 3 girdle
  • 4 pavilion
  • 5 culet
Choose the Right Synonym for brilliant

bright, brilliant, radiant, luminous, lustrous mean shining or glowing with light.

bright implies emitting or reflecting a high degree of light.

brilliant implies intense often sparkling brightness.

radiant stresses the emission or seeming emission of rays of light.

luminous implies emission of steady, suffused, glowing light by reflection or in surrounding darkness.

lustrous stresses an even, rich light from a surface that reflects brightly without glittering.

Examples of brilliant in a Sentence

Adjective a brilliant star in the sky a store decorated in brilliant colors He pitched a brilliant game. She gave a brilliant performance. She has a brilliant mind. Noun the diamond cutter set out an array of brilliants to show the various ways the diamond could be cut
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
While the stories-at-the-speed-of-life series didn't get a comedy nomination in its final season, nor did star-writer Bridgett Everett, voters did have the good sense to honor Jeff Hiller, one of the ensemble's brilliant performers. EW.com, 15 July 2025 Instead of a traditional dog crate, Mark, who only shared his first name, came up with a brilliant idea—a custom space for the dogs with a metal door. Alice Gibbs, MSNBC Newsweek, 14 July 2025 My father, who was a brilliant student, attended college on an R.O.T.C. scholarship, served in the Navy, earned a Ph.D. in pharmacology, and became a professor at the SUNY Buffalo medical school. Jessica Winter, New Yorker, 14 July 2025 The bass response is rich, buttery, and natural, while the warm yet clear top end provides pristine detail for a brilliant accompaniment across your catalog. Simon Hill, Wired News, 12 July 2025 See All Example Sentences for brilliant

Word History

Etymology

Adjective

French brillant, present participle of briller to shine, from Italian brillare

Noun

borrowed from French brillant, noun derivative of brillant brilliant entry 1

First Known Use

Adjective

circa 1681, in the meaning defined at sense 1

Noun

1690, in the meaning defined above

Time Traveler
The first known use of brilliant was circa 1681

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Cite this Entry

“Brilliant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brilliant. Accessed 21 Jul. 2025.

Kids Definition

brilliant

1 of 2 adjective
bril·​liant ˈbril-yənt How to pronounce brilliant (audio)
1
: flashing with light : very bright
brilliant jewels
2
a
: very impressive
a brilliant career
b
: very smart or clever
a brilliant student
a brilliant idea
brilliantly adverb

brilliant

2 of 2 noun
: a gem (as a diamond) cut so as to sparkle

More from Merriam-Webster on brilliant

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