- Eureka is a Greek word that is defined as "I have found it!" and is a cry of happiness or satisfaction when you find something or have an achievement.
If you've been looking for your keys for an hour and you finally find them, this is an example of a time when you would shout "Eureka!"
eureka definition by Webster's New World
- I have found (it): believed to have been uttered by Archimedes when he discovered a way to determine the purity of gold by applying the principle of specific gravity
- I've got it; yes; that's it: used to express triumphant achievement, success, or discovery
Origin: Classical Greek heurēka, I have found, perfect tense of heuriskein, to find, discover ; from Indo-European base an unverified form wer-, to find, take from source Armenian gerem, (I) capture, Old Irish fūar, I have found
eureka definition by American Heritage Dictionary
Origin: Greek heurēka, I have found (it) (supposedly exclaimed by Archimedes upon discovering how to measure the volume of an irregular solid and thereby determine the purity of a gold object), first person sing. perfect of heuriskein, to find.
eureka - Cultural Definition
A Greek word meaning “I have found it!” An exclamation that accompanies a discovery: “When she finally located the rare book, the scholar cried, ‘Eureka!’” (See Archimedes.)