Definitions

eureka

[yoo-ree-kuh, yuh-] / jʊˈri kə, jə- /

NOUN

surprise

Synonyms

STRONGEST

amazement astonishment awe bewilderment consternation curiosity disappointment jolt miracle revelation shock wonder

STRONG

abruptness attack bombshell disillusion epiphany fortune godsend incredulity kick marvel miscalculation phenomenon portent precipitance precipitation precipitousness prodigy rarity start stupefaction suddenness thunderbolt whammy wonderment

WEAK

astoundment curveball eye-opener unexpected unforeseen

Antonyms

STRONGEST

calmness composure coolness expectation happiness indifference

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The Port of Long Beach is one of only two areas primed for the assembly work; the other is Humboldt Harbor near Eureka.

From Los Angeles Times • May 24, 2026

On its website, Cursor cites endorsements from leaders at Stripe, OpenAI and Eureka Labs.

From MarketWatch • Apr. 21, 2026

Other A-Street investments include Great Minds, a curriculum provider behind such programs as Eureka Math; youth mental health startup Cartwheel Care; and AI-powered early reading platform LitLab.

From The Wall Street Journal • Apr. 8, 2026

For the man behind the pouch technology, his own Eureka moment similarly came at a music festival back in 2012.

From BBC • Jan. 24, 2026

He couldn't make the Theorem work, and he realized that his Eureka moment had been a false alarm.

From "An Abundance of Katherines" by John Green

eureka

Example Sentences

Related Words