Definitions

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.

This is the passage that zapped Ms. Prose with her eureka moment.

From The Wall Street Journal • May 1, 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

"That was the real eureka moment," said Dr. Merghoub.

From Science Daily • Nov. 20, 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

It was those birds that had given him one of his eureka moments about natural selection.

From "Charles and Emma: The Darwins' Leap of Faith" by Deborah Heiligman

eureka

Example Sentences

Related Words