eternity

noun

eter·​ni·​ty i-ˈtər-nə-tē 

plural eternities

1

: the quality or state of being eternal

2

: infinite time

lasting throughout eternity

3

eternities plural : age sense 3b

4

: the state after death : immortality

5

: a seemingly endless or immeasurable time

an eternity of delays

Synonyms of eternity

• perpetuity
• infinity
• foreverness

Examples of eternity in a Sentence

They believed that sinners would spend eternity in hell.

We suffered through an eternity of delays during the lawsuit.

Recent Examples on the Web

The assortment will include natural diamond rings, eternity bands, necklaces, bracelets and earrings, including the brand’s signature Straight-Line necklaces and bracelets. — Ryma Chikhoune, Footwear News, 26 Oct. 2026

Of course two years is an eternity in mogul-time, and even if the Democrats retake the White House in 2028, Musk may simply be too strong to regulate. — Steven Zeitchik, HollywoodReporter, 22 Oct. 2026

The pop star switched up her wedding ring stack for the occasion, wearing her 10-carat engagement ring on her right hand and her $16,000 eternity band on her left. — Hannah Malach, InStyle, 21 Oct. 2026

Nearly eight years passed between 2018’s TESTING and the arrival of the much-delayed Don’t Be Dumb, an eternity in rapper terms. — Michael Saponara, Billboard, 15 Oct. 2026

Word History

Etymology

Middle English eternite, from Middle French eternité, from Latin aeternitat-, aeternitas, from aeternus

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for eternity

• fraternity
• maternity
• modernity
• paternity
• confraternity
• taciturnity

Kids Definition

eternity

noun

eter·​ni·​ty i-ˈtər-nət-ē 

plural eternities

1

: the quality or state of being eternal

2

: endless time

3

: the state after death : immortality

4

: time that seems to be endless