What does eurika mean?

"Eureka" is a Greek word meaning "I have found it!" It's often used to express a sudden realization or discovery, usually of something important or exciting.

The story behind the word is attributed to the Greek mathematician and inventor Archimedes. Legend says he was in his bath when he realized how to determine the volume of an irregular object, and shouted "Eureka!" as he jumped out of the tub.