Phrase guide

eureka moment

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

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Pronunciation

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1

noun

Meaning 1

The moment of a sudden unexpected discovery.

Definition source: English Wiktionary via Wiktextract

Usage: idiomatic

Examples

  • 2002, Evolutionary biology's 'Eureka!' moment supposedly took place some time in September or October 1835, during the Beagle's five-week visit to the Galapagos Islands. — London Review of Books, 7 Mar 2002
  • 2002, The dreams of a farm boy, the eureka moment in a potato field, the confession to a teacher, the confidence in him shown by businessmen and bankers and investors, the breakthroughs in the laboratory, all the years of work, the decisions of the official patent examiners, those hard-fought victories, all of those demonstrations that had come and gone, the entire vision of the future. — The New Yorker, 27 May 2002
  • 2003, In “Higher,” Bascomb’s account of the race at the end of the nineteen-twenties to build the tallest building in the world, we get one wonderful origin myth and eureka moment: an engineer sees his wife resting a heavy book on the family birdcage and realizes that a lightweight girded structure can carry an immensely heavy load. — The New Yorker, 15 Dec 2003
  • 2004, Historians teach us to be suspicious of "Eureka" moments, but there are moments when something happens to make one say "Eureka" — The New Yorker, December 6, 2004, p.104

Meaning relationships

Synonyms: light-bulb moment

Antonyms: none provided

History

Etymology

No etymology was provided for this word.

Across languages

Translations

3 source translations are retained for this English entry.

  • Finnish: ahaa-elämys — the moment of a sudden unexpected discovery
  • Polish: eureka — the moment of a sudden unexpected discovery
  • Spanish: momento [de] eureka — the moment of a sudden unexpected discovery