Meaning
An exclamation of triumph at a sudden discovery or breakthrough, meaning 'I have found it.' It also serves as a modifier ('a eureka moment'). The word keeps the jubilant, slightly theatrical energy of its Greek original, and English speakers deploy it sincerely by scientists and problem-solvers or ironically about trivial realizations alike. Playful to exultant register; often capitalized in exclamatory use and frequently ironic for minor discoveries. Regional use: General English (borrowed from Greek).
Origin
From Greek heureka, 'I have found (it),' the first-person singular perfect of heuriskein, 'to find,' the same root that gives English 'heuristic.' According to tradition, the mathematician Archimedes (c. 287-212 BCE) shouted it on realizing, in his bath, how to test whether the crown made for Hiero II, king of Syracuse, contained baser metal, though the story is ancient anecdote rather than documented fact. English borrowed the exclamation around 1600: Etymonline dates it to about 1600 and Merriam-Webster gives a first known use of 1603. 'Eureka!' later became the state motto of California, chosen in reference to the gold-rush discovery of 1849, which embedded the word in American place naming.
Research Sources
References used to check this entry’s meaning, history, or documented forms.
Variants
- eureka moment
- heureka
Usage Examples
- Eureka! The error had been hiding in the spreadsheet's third column all along.
- Her eureka moment arrived while she was watering the tomatoes.
- He kept a notebook of late-night eurekas that looked less brilliant by morning.