eureka

[yoo-ree-kuh, yuh-] / yʊˈri kə, yə- /

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.

That was a eureka moment and one that I carried with me for the rest of my life.

From The Wall Street Journal • May 7, 2026

I think my first eureka moment was when I was traveling in sub-Saharan Africa on the Ivory Coast doing a site visit.

From Barron's • Mar. 5, 2026

"It's one of those eureka moments that you think 'nature is trying to tell us something here.'"

From Science Daily • Oct. 16, 2025

This is a eureka moment for astronomers as they just found a new way to track Venusian weather over the past decade - the longest duration of observation ever.

From Space Scoop • Jul. 8, 2025

Hudson leans in, puts his fist underneath his chin, and stares off into the sky like he’s just had the most epic eureka moment and is now ready to remake the world.

From "What If It's Us" by Becky Albertalli and Adam Silvera

eureka

Example Sentences

Related Words