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

But there’s a big problem in the form of Joan’s first husband Luke (Callum Turner), who tragically died young in war and is also desperate for his own eternity with her. —Ct Jones, Rolling Stone, 28 Nov. 2025

But a nice unifier is gathering around a screen and watching something together, and there are plenty of options this Thanksgiving to choose from, from a trip to the Upside Down, eternity, or Zootopia. —Savannah Salazar, Vulture, 28 Nov. 2025

Stars Miles Teller, Elizabeth Olsen and Callum Turner in an afterlife love triangle where souls have one week to decide where, and with whom, to spend eternity. —Jill Goldsmith, Deadline, 27 Nov. 2025

Everyone who arrives is assigned an Afterlife Coordinator and given seven days to choose one of many flavors of eternity. —Jp Mangalindan, Time, 26 Nov. 2025

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