brilliant

1 of 2

adjective

bril·​liant ˈbril-yənt 

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

• 1 table
• 2 bezel
• 3 girdle
• 4 pavilion
• 5 culet

Synonyms

Adjective

• beaming
• bedazzling
• bright
• candescent
• clear
• dazzling
• effulgent
• fulgent
• glowing
• incandescent
• lambent
• lucent
• lucid
• luminous
• lustrous
• radiant
• refulgent
• sheeny
• shining
• shiny
• splendid

Noun

• gem
• gemstone
• jewel
• rock [slang]

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

Adjective

Nemesis is the story of two men on either side of the law, the tale of what happens when an unstoppable force (an expert criminal), Coltrane Wilder (Noel), meets an immovable object (a brilliant police detective), Isaiah Stiles (Law). —Rosy Cordero, Deadline, 18 Mar. 2025

The actor also has various business ventures, including being a founder and brewer at All-Wise Meadery and co-founder of the high-protein yogurt-like product Thor’s Skyr, along with Terry Crews. 02 of 08 Cole Sprouse (Cody) Cole Sprouse plays Zack’s brilliant twin brother Cody. —Skyler Trepel, EW.com, 18 Mar. 2025

There’s even a $90 discount on this 50-inch Insignia Fire TV that provides access to millions of movies and television episodes in brilliant 4K quality. —Clara McMahon, People.com, 18 Mar. 2025

Bhatia has been brilliant through the bag through two days this week, sitting fourth in the field in strokes gained putting, top 20 in ball striking and 10-for-12 scrambling around these difficult greens. 4. —Justin Ray, The Athletic, 15 Mar. 2025

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

Rhymes for brilliant

• resilient

Kids Definition

brilliant

1 of 2 adjective

bril·​liant ˈbril-yənt 

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