English Reference

Word

eureka

Phoneticseu·re·ka, stress on the second syllable

US/jʊˈɹikə/

UK/juːɹˈiːkɐ/

Definition

interj. a word you shout when you suddenly find the answer to a problem or make a great discovery.

interj. an exclamation used to celebrate a sudden discovery or the successful solution to a problem. Derived from the Greek for 'I have found it'.

Examples

“Eureka! I finally found my lost keys.”

“After hours of staring at the complex math problem, she shouted 'Eureka!' as the solution became clear.”

“The scientist experienced a true eureka moment when the results of the final experiment confirmed his long-standing hypothesis about cellular regeneration.”

Examples

simple

“Eureka! I finally found my lost keys.”

contextual

“After hours of staring at the complex math problem, she shouted 'Eureka!' as the solution became clear.”

complex

“The scientist experienced a true eureka moment when the results of the final experiment confirmed his long-standing hypothesis about cellular regeneration.”

Usage

Often used as a standalone exclamation or to modify the noun 'moment'.

Related words

Idioms

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.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL 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: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Frequent
Level
C1 · Advanced
Updated

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English Reference