eter·ni·ty | \i-ˈtər-nə-tē \
plural eternities

Definition of eternity 

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

Keep scrolling for more

Synonyms for eternity


aeon (or eon), age, blue moon, cycle, forever, long, months, moon

Visit the Thesaurus for More 

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

And like ghosts, our boos will haunt you for all of eternity. Stephanie Farr,, "5 reasons Trump should fear how Eagles fans might respond to canceled White House visit," 5 June 2018 Perhaps the tree itself, long held as a symbol of eternity, has something to do with Le grand Génois’s endless appeal. Lilah Ramzi, Vogue, "This Textile Has Been All Over Vogue—Here’s Where It Came From," 1 June 2018 If Hell exists, and souls are condemned to an eternity of damnation and torture, then doesn’t that make God evil? David Sims, The Atlantic, "Come Sunday Is an Uneven Biopic of Faith and Dissent," 12 Apr. 2018 Russia has succeeded in building a regime that embodies the politics of eternity. Sean Illing, Vox, "How Russia pioneered “fake news”," 5 Apr. 2018 Let it be known — from here to the very end of eternity — that Travis Scott is Stormi Webster's father and there's no doubt about it, okay?! Noelle Devoe, Seventeen, "Kris Jenner Slams Rumors That Tyga is Kylie Jenner's Baby's Father: "Oh, No, No, No, No"," 13 Mar. 2018 That might even be the optimistic way of interpreting the lyric, which when read out of context comes off nearly like the pop equivalent to No Exit, a bitter resignation to an eternity of monotony, without potential for escape. Andrew Unterberger, Billboard, "Otis Redding's '(Sittin' On) The Dock of the Bay' Is the Chillest Song Ever About Existential Angst," 8 Jan. 2018 During her early days in the press, Princess Diana was often seen with a diamond eternity band on her right hand. Mehera Bonner, Marie Claire, "The 6 Royal Rings Prince Harry Could Propose to Meghan Markle With," 12 May 2017 The Door is the breach that leads to the Valley Beyond, where the hosts can live undisturbed for all eternity., "Westworld Season 2 Finale Recap: A Whole Lotta Ben Barnes," 25 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'eternity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of eternity

14th century, in the meaning defined at sense 1

History and Etymology for eternity

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

Keep scrolling for more

Learn More about eternity

Statistics for eternity

Last Updated

12 Oct 2018

Look-up Popularity

Time Traveler for eternity

The first known use of eternity was in the 14th century

See more words from the same century

Keep scrolling for more

More Definitions for eternity



English Language Learners Definition of eternity

: time without an end

: a state that comes after death and never ends

: time that seems to be without an end


eter·ni·ty | \i-ˈtər-nə-tē \
plural eternities

Kids Definition of eternity

1 : time without end

2 : the state after death

3 : a period of time that seems endless I waited an eternity.

Keep scrolling for more

Comments on eternity

What made you want to look up eternity? Please tell us where you read or heard it (including the quote, if possible).


one that holds something together

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Syn City

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!