1

eureka

play
interjection eu·re·ka \yu̇-ˈrē-kə\

Definition of eureka

  1. —used to express triumph on a discovery

Did You Know?

When people exclaim Eureka! they are reenacting a legendary event in the life of the Greek mathematician and inventor Archimedes. While wrestling with the problem of how to determine the purity of gold, he made the sudden realization that the buoyancy of an object placed in water is equal in magnitude to the weight of the water the object displaces. According to one popular version of the legend, he made his discovery at a public bathhouse, whereupon he leapt out of his bath, exclaimed “Heureka! Heureka!” (“I have found it!”), and ran home naked through the streets. The absence of a contemporary source for this anecdote has done nothing to diminish its popularity over the centuries.

Origin and Etymology of eureka

Greek heurēka I have found, from heuriskein to find; from the exclamation attributed to Archimedes on discovering a method for determining the purity of gold — more at heuristic


2

eureka

adjective eu·re·ka

Definition of eureka

  1. :  marked by usually sudden triumphant discovery a eureka moment

Recent Examples of eureka from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'eureka'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of eureka

1948


eureka

play
Greek verb eu·re·ka \yu̇-ˈrē-kä\

Definition of eureka

  1. :  I have found (it) —motto of California


Eureka

play
geographical name Eu·re·ka \yu̇-ˈrē-kə\

Definition of Eureka

  1. city and port on Humboldt Bay in northwestern California population 27,191


EUREKA Defined for English Language Learners

eureka

play
interjection

Definition of eureka for English Language Learners

  • —used to express excitement when a discovery has been made


Learn More about eureka


Seen and Heard

What made you want to look up eureka? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

marked by lack of plan or order

Get Word of the Day daily email!

Test Your Vocabulary

The Emoji Quiz

  • emoji-the-quiz
  • What phase of the moon is this: 🌖 ?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!