English Reference

Word

brilliant

Phoneticsbril·liant, stress on the first syllable

US/ˈbɹɪɫjənt/

UK/bɹˈɪlɪənt/

Definitions

01very smart

A2 · Elementary

adj. extremely intelligent or clever.

adj. possessing or displaying exceptional cognitive ability or mental acuity.

“She had a brilliant idea for solving the math problem.”

“The scientist was widely regarded as a brilliant theorist whose work redefined the field of quantum mechanics.”

Antonyms

02excellent

A2 · Elementary

adj. very good, wonderful, or successful.

adj. of surpassing excellence; magnificent or highly successful.

“The actors gave a brilliant performance in the new play.”

“The campaign was a brilliant success, exceeding all projected targets within the first three months.”

Antonyms

03shining brightly

B1 · Intermediate

adj. shining with a lot of light.

adj. shining brightly; characterized by high luminosity or intense reflection of light.

“The brilliant sunshine made the water look like silver.”

“The brilliant light of the midday sun reflected off the glass skyscrapers, blinding the pedestrians below.”

Antonyms

04a gemstone

C2 · Proficiency Countable noun Technical

n. a diamond or other jewel cut in a way that makes it shine very brightly.

n. a gemstone, typically a diamond, cut with numerous facets to maximize light reflection.

“The engagement ring featured a large brilliant surrounded by smaller sapphires.”

“The jeweler explained that the brilliant cut is designed specifically to enhance the natural fire of the diamond.”

Synonyms

Word family

ADJECTIVE

Brilliant(A2)

Domain

Printing

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.A2 KeyIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.3.0–4.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 2.0–2.524–43TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.225–549
Frequency
Common
Level
A2 · ElementaryOxford
Updated

QR code

englishreference.com/q/brilliant

English Reference