brilliant

1 of 2

adjective

bril·​liant ˈbril-yənt How to pronounce brilliant (audio)
Synonyms of brilliant
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

Synonyms of brilliant

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Adjective

Noun

See All Synonyms & Antonyms in Thesaurus
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
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Adjective
Only a few watched long enough and with sufficient patience to be rewarded with a full view of the brilliant spectacle. — Aj Willingham, AJC.com, 12 Aug. 2026 The most important competitive advantage may not be a breakthrough product, a brilliant CEO, or even a winning strategy. — Rodger Dean Duncan, Forbes.com, 11 Aug. 2026 Located on the southwest coast of Crete, the beach’s calm, shallow waters are the kind of brilliant turquoise that seems almost too vivid to be real. — Lydia Mansel, Travel + Leisure, 11 Aug. 2026 The one-hour psychological horror thriller follows Rose (Balfe), a relentless documentary filmmaker and recently divorced mother, brilliant at uncovering others’ truths but struggling to resolve her own. — Nellie Andreeva, Deadline, 10 Aug. 2026 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

Rhymes for brilliant

See All Rhymes for brilliant

Browse Nearby Words

brilliandeer
brilliant
brilliant crocein
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Cite this Entry

“Brilliant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brilliant. Accessed 13 Aug. 2026.

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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

Nglish: Translation of brilliant for Spanish Speakers

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